What's In My Jar
May Island 7 Days Secret Centella Cica Toner
May Island

May Island 7 Days Secret Centella Cica Toner

Efficacy100/100IrritancyHigh
See all ingredients

Works for

Evens skin tone
Niacinamide, Glycolic acid + 5 more
Works well
What the product description says
“Helps brighten skin tone while reducing the appearance of fine lines and wrinkles.”
Source: Yesstyle

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: glycolic acid, niacinamide

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually can help even out the skin tone: dipotassium glycyrrhizate, madecassoside.

Keep in mind that you would need to apply any topical skincare targetted at hypigmentation consistently for a couple of months to get a result. No topical skincare product can help get rid of hyperpigmentation (including post-acne marks and age spots) instantly.

NiacinamideKey activeEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~4.3–5.2%
Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~0.15–0.3%
Dipotassium glycyrrhizateEffect: LowA salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening~1–1.2%
MadecassosideEffect: LowAn antioxidant that is typically derived from plant Centella Asiatica. It can help neutralize free radicals in skin and support skin barrier function. It could, however, itself be irritating. It is often unstable in formulations~0.05–0.15%
Salicylic acidEffect: Low, below effective doseUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)~0.2–0.4%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.45–0.65%
Lactic acidUnder-dosedAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~0.2–0.35%
Moisturizing
Niacinamide, Palmitoyl tripeptide-5 + 15 more
Works well
What the product description says
“A toner, specially formulated for sensitive, acne-prone skin, infuses AHA, BHA, PHA to remove dead skin cells while strengthening skin's barrier.”
Source: Yesstyle

This product contains good ingredients to attract water to the upper layer of the skin. These ingredients are called "humectants": betaine, dipotassium glycyrrhizate.

When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from within deeper layers of the skin. If the air is dry, humectants can speed up the moisture loss from the skin. This is why it is a good idea to use another product on top of this one to help "seal in" the moisture (look for ingredients like dimethicone, squalane, oils and butters).

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: madecassoside, niacinamide, palmitoyl tripeptide-5

NiacinamideHeroEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~4.3–5.2%
Palmitoyl tripeptide-5HeroEffect: HighA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.15%
MadecassosideHeroEffect: HighAn antioxidant that is typically derived from plant Centella Asiatica. It can help neutralize free radicals in skin and support skin barrier function. It could, however, itself be irritating. It is often unstable in formulations~0.05–0.15%
BetaineKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin and improves the product texture~1.7–2.1%
Dipotassium glycyrrhizateKey active· HumectantEffect: HighA salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening~1–1.2%
Centella asiatica extractKey activeEffect: HighA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.45–0.65%
GlycerinKey active· HumectantEffect: HighOne of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant~0.35–0.6%
AdenosineKey activeEffect: MediumMight help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)~0.35–0.6%
Sodium lactateKey active· HumectantEffect: HighHelps attract water to the upper layer of the skin. Is often used to adjust the pH level of the product~0.25–0.4%
Moringa oleifera seed extractKey activeEffect: MediumHelps soften the upper layer of the skin and might have some antioxidant effect~0.25–0.45%
Tartaric acidKey activeEffect: MediumAn AHA (alpha-hydroxy acid). It oxidizes quickly which makes it less effective in skincare formulations. It can support skin's barrier and moisture levels~0.15–0.25%
Caprylyl glycol· Humectant, EmollientEffect: LowHelps preserve products and creates a nice product texture~1.3–1.6%
Butylene glycol· HumectantEffect: LowUsed to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin~0.2–0.4%
Nelumbo nucifera flower extractEffect: Low, below effective dose~0.2–0.4%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.45–0.65%
AllantoinUnder-dosedHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.35–0.65%
Lactic acidUnder-dosedAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~0.2–0.35%
Anti-aging
Niacinamide, Centella asiatica extract + 6 more
Works well
What the product description says
“Helps brighten skin tone while reducing the appearance of fine lines and wrinkles.”
Source: Yesstyle

This product can help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness because it contains adenosine, glycolic acid, niacinamide.

These ingredients in the product can also be helpful, even though there is less evidence for their effectiveness: centella asiatica extract, madecassoside, palmitoyl tripeptide-5.

Keep in mind that it typically takes at least 6 weeks to notice any results because the changes that are needed to improve fine lines and elasticity happen in the deeper layers of the skin. No topical anti-aging product can “erase” wrinkles or fully reverse signs of aging.

NiacinamideKey activeEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~4.3–5.2%
Centella asiatica extractKey activeEffect: MediumA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.45–0.65%
AdenosineKey activeEffect: HighMight help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)~0.35–0.6%
Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~0.15–0.3%
Palmitoyl tripeptide-5Key activeEffect: MediumA type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles~0.1–0.15%
MadecassosideKey activeEffect: MediumAn antioxidant that is typically derived from plant Centella Asiatica. It can help neutralize free radicals in skin and support skin barrier function. It could, however, itself be irritating. It is often unstable in formulations~0.05–0.15%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.45–0.65%
Lactic acidUnder-dosedAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~0.2–0.35%
Anti-oxidation
Side benefit · Centella asiatica extract, Tartaric acid + 5 more
Works well

This product contains antioxidants (madecassoside) that can help neutralize free radicals in skin. By doing so, they can lessen the damage the skin gets from the UV light (sun).

The following ingredients - centella asiatica extract, tartaric acid also can have an antioxidant effect, but there is less evidence to confirm their effectiveness in skin.

Centella asiatica extractKey activeEffect: MediumA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.45–0.65%
Tartaric acidKey activeEffect: MediumAn AHA (alpha-hydroxy acid). It oxidizes quickly which makes it less effective in skincare formulations. It can support skin's barrier and moisture levels~0.15–0.25%
MadecassosideKey activeEffect: HighAn antioxidant that is typically derived from plant Centella Asiatica. It can help neutralize free radicals in skin and support skin barrier function. It could, however, itself be irritating. It is often unstable in formulations~0.05–0.15%
AdenosineEffect: LowMight help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)~0.35–0.6%
Moringa oleifera seed extractEffect: LowHelps soften the upper layer of the skin and might have some antioxidant effect~0.25–0.45%
Nelumbo nucifera flower extractEffect: Low, below effective dose~0.2–0.4%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.45–0.65%
Exfoliation
Side benefit the brand mentions · Glycolic acid, Tartaric acid + 4 more
Works well
What the product description says
“Brand from South Korea May Island. Benefits A toner, specially formulated for sensitive, acne-prone skin, infuses AHA, BHA, PHA to remove dead skin cells while strengthening skin's barrier.”
Source: Yesstyle

This product can help exfoliate the skin. In other words, it helps break down the bonds between dead cells on the surface of the skin and speed up the skin turnover. Skin often appears softer and brighter after exfoliation, but overdoing it can result in disrupted skin barrier. The following ingredient is doing the exfoliating job in this product: glycolic acid.

Glycolic acidKey activeEffect: HighAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~0.15–0.3%
Tartaric acidKey activeEffect: MediumAn AHA (alpha-hydroxy acid). It oxidizes quickly which makes it less effective in skincare formulations. It can support skin's barrier and moisture levels~0.15–0.25%
AllantoinEffect: Low, below effective doseHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.35–0.65%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.45–0.65%
Lactic acidUnder-dosedAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)~0.2–0.35%
Salicylic acidUnder-dosedUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)~0.2–0.4%
Anti-blemish
Side benefit · Niacinamide, Glycolic acid + 4 more
Works well

This product can help reduce breakouts and clogged pores because it contains the following ingredient: niacinamide. This ingredient is used for treating acne and can have a noticeable effect.

The following ingredient (ingredients) in this product might be helpful, but there is no evidence to confirm that it actually works: glycolic acid

NiacinamideHeroEffect: HighIs proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production~4.3–5.2%
Glycolic acidKey activeEffect: MediumAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid~0.15–0.3%
Centella asiatica extractEffect: LowA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.~0.45–0.65%
AllantoinEffect: Low, below effective doseHelps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated~0.35–0.65%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.45–0.65%
Salicylic acidUnder-dosedUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)~0.2–0.4%

Can it cause trouble?

Irritancy
8 strong irritants: Alcohol, Hamamelis virginiana leaf extract + 6 more — patch-test recommended
High risk
We flagged 24 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
AlcoholCan be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial propertiesHigh~8.1–9.9%est.
Hamamelis virginiana leaf extractA plant extract that can help calm down inflammation in skin. Can, however, itself be irritatingHigh~0.75–1.1%est.
Melaleuca alternifolia leaf water—High~0.6–0.9%est.
Carica papaya fruit extract—High~0.25–0.5%est.
Nelumbo nucifera flower extract—High~0.2–0.4%est.
Salicylic acidUsed for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)High~0.2–0.4%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.2–0.35%est.
Citrus aurantium bergamia peel oil—High~0.2–0.4%est.
LinaloolA fragrance. Can be irritatingHigh~0.2–0.35%est.
Glycolic acidAn alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acidHigh~0.15–0.3%est.
Peg-60 hydrogenated castor oilHelps oil and water mix togetherMedium~2.2–2.6%est.
HydroxyacetophenoneUsed to increase effectiveness of preservativesMedium~1.5–1.8%est.
Caprylyl glycolHelps preserve products and creates a nice product textureMedium~1.3–1.6%est.
EthylhexylglycerinA preservativeMedium~0.5–0.75%est.
GluconolactoneA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicalsMedium~0.45–0.65%est.
Centella asiatica extractA plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.Medium~0.45–0.65%est.
Disodium edtaStabilizes the product formulationMedium~0.3–0.6%est.
Moringa oleifera seed extractHelps soften the upper layer of the skin and might have some antioxidant effectMedium~0.25–0.45%est.
Sodium lactateHelps attract water to the upper layer of the skin. Is often used to adjust the pH level of the productMedium~0.25–0.4%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.2–0.4%est.
1,2-hexanediolA preservativeMedium~0.2–0.4%est.
Lactic acidAn exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)Medium~0.2–0.35%est.
Tartaric acidAn AHA (alpha-hydroxy acid). It oxidizes quickly which makes it less effective in skincare formulations. It can support skin's barrier and moisture levelsMedium~0.15–0.25%est.
MadecassosideAn antioxidant that is typically derived from plant Centella Asiatica. It can help neutralize free radicals in skin and support skin barrier function. It could, however, itself be irritating. It is often unstable in formulationsMedium~0.05–0.15%est.
Comedogenic
Clean of flagged comedogenic ingredients
None flagged
Alternatives
Cheaper, or higher on efficacy
3HA Clear Toner
esfolio 3HA Clear Toner
Cheaper79% match
$9.99
Pink AHA BHA Toner
NACIFIC Pink AHA BHA Toner
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$12.75
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Ingredients

Filter by role to see what each ingredient is doing.

Water~45–55%
Formula
Irritation risk
Low

Plain old water

More about Water
Alcohol~8.1–9.9%
Irritant · high
Irritation risk
High
Works for
Antibacterial

Can be drying and contribute to skin irritation. Used in formulars to dissolve other ingredients, create a thinner product consistency or for its antibacterial properties

More about Alcohol
Niacinamide~4.3–5.2%
Hero · Moisturizing, Anti-blemish
Irritation risk
Low
Works for
Anti-agingAnti-blemishEvens skin toneMoisturizingReduces irritationAnti-inflammatoryAntibacterialReduces redness

Is proven to be effective in reducing blemishes, evening out skin tone and helping to improve lines and wrinkles. It helps the skin to repair sun damage, calm down inflammation and keep maintain good levels of moisture. The concentration of about 2% is effective for supporting the skin barrier and evening out the skin tone. Concentration of 4-6% is better for helping with acne and balancing the sebum production

More about Niacinamide
Dipropylene glycol~2.8–3.4%
Formula
Irritation risk
Low

Helps to dissolve other ingredients in a formulation. Slows down the rate of product drying

More about Dipropylene glycol
Peg-60 hydrogenated castor oil~2.2–2.6%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Helps oil and water mix together

More about Peg-60 hydrogenated castor oil
Betaine~1.7–2.1%
Key active
Irritation risk
Low
Works for
Moisturizing

Helps attract water to the upper layer of the skin and improves the product texture

More about Betaine
Hydroxyacetophenone~1.5–1.8%
Irritant · medium
Irritation risk
Medium

Used to increase effectiveness of preservatives

More about Hydroxyacetophenone
Caprylyl glycol~1.3–1.6%
Irritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps preserve products and creates a nice product texture

More about Caprylyl glycol
Dipotassium glycyrrhizate~1–1.2%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-inflammatoryEvens skin tone

A salt derived from licorice. Works as an emollient to soften the upper layer of the skin and can help calm down inflammation. Might be helpful for skin lightening

More about Dipotassium glycyrrhizate
Hamamelis virginiana leaf extract~0.75–1.1%
Irritant · high
Irritation risk
High
Works for
Anti-inflammatory

A plant extract that can help calm down inflammation in skin. Can, however, itself be irritating

More about Hamamelis virginiana leaf extract
Melaleuca alternifolia leaf water~0.6–0.9%
Irritant · high
Irritation risk
High
More about Melaleuca alternifolia leaf water
Ethylhexylglycerin~0.5–0.75%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Gluconolactone~0.45–0.65%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-agingEvens skin toneExfoliationAnti-blemishAnti-oxidation

A polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals

More about Gluconolactone
Allantoin~0.35–0.65%
Under-dosed
Irritation risk
Low
Works for
MoisturizingAnti-inflammatoryReduces irritationReduces rednessAnti-blemishExfoliation

Helps calm down inflammation in skin and can help reduce itching. Helps to repair the skin barrier and keep skin hydrated

More about Allantoin
Adenosine~0.35–0.6%
Key active
Irritation risk
Low
Works for
Anti-agingMoisturizingAnti-oxidation

Might help improve cell turnover and reduce inflammation in skin. One study shows that the ingredients might be able to help reduce dynamic wrinkles (for example, in the corners of the eyes or on the forehead)

More about Adenosine
Centella asiatica extract~0.45–0.65%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Reduces rednessMoisturizingAnti-inflammatoryReduces irritationAnti-oxidationAnti-agingAnti-blemish

A plant extract that has been shown to be able to reduce inflammation in skin, support restoration of skin barrier function, as well as support collagen production. Contains active compounds called centelloids: asiaticoside, madecasosside, asiatic acid and madecassic acid. Might be helpful in preventing stretch marks. It can be itself be irritating though.

More about Centella asiatica extract
Disodium edta~0.3–0.6%
Irritant · medium
Irritation risk
Medium

Stabilizes the product formulation

More about Disodium edta
Glycerin~0.35–0.6%
Key active
Irritation risk
Low
Works for
Moisturizing

One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant

More about Glycerin
Carica papaya fruit extract~0.25–0.5%
Irritant · high
Irritation risk
High
More about Carica papaya fruit extract
Moringa oleifera seed extract~0.25–0.45%
Key activeIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidation

Helps soften the upper layer of the skin and might have some antioxidant effect

More about Moringa oleifera seed extract
Nelumbo nucifera flower extract~0.2–0.4%
Irritant · high
Irritation risk
High
Works for
Anti-oxidationMoisturizing
More about Nelumbo nucifera flower extract
Salicylic acid~0.2–0.4%
Under-dosedIrritant · high
Irritation risk
High
Works for
Anti-inflammatoryAnti-blemishExfoliationAntibacterialEvens skin tone

Used for skin exfoliation. It has an anti-inflammatory and anti-bacterial effect, helps to unclog pores, prevent blemishes and speed up healing of the existing ones. Sometimes referred to as a BHA (beta-hydroxy acid)

More about Salicylic acid
Swiftlet nest extract~0.2–0.35%
Formula
Irritation risk
Low
More about Swiftlet nest extract
Limonene~0.2–0.35%
Irritant · high
Irritation risk
High

A common frangrance that can easily irritate skin, especially if exposed to air, light or heat

More about Limonene
Citrus aurantium bergamia peel oil~0.2–0.4%
Irritant · high
Irritation risk
High
More about Citrus aurantium bergamia peel oil
Sodium lactate~0.25–0.4%
Key activeIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

Helps attract water to the upper layer of the skin. Is often used to adjust the pH level of the product

More about Sodium lactate
Butylene glycol~0.2–0.4%
Formula
Irritation risk
Low
Works for
Moisturizing

Used to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin

More about Butylene glycol
Citric acid~0.2–0.4%
Irritant · medium
Irritation risk
Medium

Can work as an exfoliant but is typically used to adjust the product pH

More about Citric acid
Linalool~0.2–0.35%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
1,2-hexanediol~0.2–0.4%
Irritant · medium
Irritation risk
Medium

A preservative

More about 1,2-hexanediol
Hydroxyethylcellulose~0.2–0.4%
Formula
Irritation risk
Low

Used to thicken product formulations and create gel-like textures

More about Hydroxyethylcellulose
Lactic acid~0.2–0.35%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Evens skin toneMoisturizingExfoliationAnti-aging

An exfoliating and moisturizing alpha-hydroxy acid (AHA). Typically causes less irritation than other AHAs, for example, glycolic acid. At high concentrations (about 15%), lactic acid can help reduce lines and wrinkles. Recent studies show that lactic acid can support the "good" bacteria living on skin's surface (healthy skin microbiome)

More about Lactic acid
Malic acid~0.2–0.35%
Formula
Irritation risk
Low

Helps adjust the product pH

More about Malic acid
Glycolic acid~0.15–0.3%
Key activeIrritant · high
Irritation risk
High
Works for
ExfoliationEvens skin toneAnti-agingAnti-blemish

An alpha-hydroxy acid (AHA) that helps to remove the dead skin cells on the surface of the skin reveling a more even, smoother complexation. It is also able to stimulate collagen production with long-term use. Could help to reduce pore congestion. It can be irritating to the skin. Apply sunscreen daily if using products with glycolic acid

More about Glycolic acid
Tartaric acid~0.15–0.25%
Key activeIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidationExfoliation

An AHA (alpha-hydroxy acid). It oxidizes quickly which makes it less effective in skincare formulations. It can support skin's barrier and moisture levels

More about Tartaric acid
Pyruvic acid~0.1–0.25%
Formula
Irritation risk
Low
More about Pyruvic acid
Polysorbate 20~0.1–0.25%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Polysorbate 20
Palmitoyl tripeptide-5~0.1–0.15%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingAnti-aging

A type of peptide. Peptides are excellent moisturizers and might be able support collagen production reducing fine lines and wrinkles

More about Palmitoyl tripeptide-5
Madecassoside~0.05–0.15%
Hero · MoisturizingIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidationAnti-agingEvens skin tone

An antioxidant that is typically derived from plant Centella Asiatica. It can help neutralize free radicals in skin and support skin barrier function. It could, however, itself be irritating. It is often unstable in formulations

More about Madecassoside
Ingredient list view

Water, Alcohol, Niacinamide, Dipropylene glycol, Peg-60 hydrogenated castor oil, Betaine, Hydroxyacetophenone, Caprylyl glycol, Dipotassium glycyrrhizate, Hamamelis virginiana leaf extract, Melaleuca alternifolia leaf water, Ethylhexylglycerin, Gluconolactone, Allantoin, Adenosine, Centella asiatica extract, Disodium edta, Glycerin, Carica papaya fruit extract, Moringa oleifera seed extract, Nelumbo nucifera flower extract, Salicylic acid, Swiftlet nest extract, Limonene, Citrus aurantium bergamia peel oil, Sodium lactate, Butylene glycol, Citric acid, Linalool, 1,2-hexanediol, Hydroxyethylcellulose, Lactic acid, Malic acid, Glycolic acid, Tartaric acid, Pyruvic acid, Polysorbate 20, Palmitoyl tripeptide-5, Madecassoside

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Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
May Island7 Days Secret Centella Cica TonerYOUR PRODUCTFarm StayDermacube Probiotics Therapy Toneresfolio3HA Clear TonerAPLBAHA BHA PHA Glutathione Cica Toner
Match—85%79%79%
Price—$23.49$9.99$23.07
Shared key ingredients—7 of 148 of 147 of 14
Key difference—Folic AcidLactobionic AcidLactobionic Acid
Irritancy High Medium High High
Drying alcohol Contains drying alcohol —— Contains drying alcohol
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More alternatives: Glossier SolutionNACIFIC Pink AHA BHA Toner

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Product summary

"May Island - 7 Days Secret Centella Cica Toner" is effective for: Moisturizing, Evens skin tone, Exfoliation, Anti-aging and Anti-blemish

Ingredient callouts

  • A good concentration of Niacinamide (4.30% - 5.20%). Niacinamide is a well-studied multi-tasking active. It is stable, and can work well in almost any hydrating formulation. There is solid evidence that Niacinamide can help support skin barrier, regulate oil production and reduce acne and clogged pores. It also helps to fight photodamage and improve the skin tone, reducing pigmentation marks.
  • This product contains acids (gluconolactone 0.45% - 0.65%, glycolic acid 0.15% - 0.30% and lactic acid 0.20% - 0.35%). Their concentration is low, and they will not have a strong exfoliating effect. Instead, they work to support the skin natural acid mantle and to attract water (as humectants). PHAs (gluconolactone) especially are great for improving skin hydration. They might be even able to stimulate the production of skin's natural humectants and support the healthy skin microbiome.
  • Peptides (palmitoyl tripeptide-5 0.10% - 0.15%). Peptides are a very big group of ingredients. They all consist of a different combination of aminoacids. Our skin produces Peptides naturally. Some of them work as natural antibiotics, promote wound-healing and production of collagen. The scientists are still studying how effective the topical application of Peptides is, but it is very likely that theynare helpful. Peptides might be able to support skin barrier restoration and even have an anti-aging benefit. At the very least, they certainly help attract water to the skin and support the hydration in this way.
  • Adenosine 0.35% - 0.60%. It is a compound that in involved in many biological processes inside the skin cells. According one high-quality clinical trial, topical Adenosine in low concentrations can somewhat help improve "deep wrinkles" - the wrinkles that appear with age in places where our faces are most dynamic (for example, on the forehead or in the corners of the eyes).
  • Actives derived from an extract of the Centella Asiatica plant (also known as Gotu Kola) - madecassoside 0.05% - 0.15% The Centella Asiatica Actives help strengthen and restore the skin barrier, decrease inflammation in skin and neutralize free radicals. They also can help to reduce scarring. The good news is that these actives work even in low concentrations.
  • Dipotassium Glycyrrhizate in this product (1.00% - 1.20%) can also further help improve the skin barrier. It might be able to calm down inflammation and reduce sensitivity. Dipotassium Glycyrrhizate is an active compound from the licorice root.
  • Humectants (sodium lactate 0.25% - 0.40%, glycerin 0.40% - 0.60%, dipotassium glycyrrhizate 1.00% - 1.20% and betaine 1.70% - 2.10%). These ingredients help attract water to the upper layer of the skin and improve the skin hydration.

Price

The product retails for 20.30$ in the United States.

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Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 45 studies and safety reviews.

  1. 1
    Niacinamide - mechanisms of action and its topical use in dermatologyncbi.nlm.nih.gov
  2. 2
    Gehring, W. (2004). Nicotinic acid/niacinamide and the skin. Journal of Cosmetic Dermatology, 3(2), 88–93. doi:10.1111/j.1473-2130.2004.00115.x ncbi.nlm.nih.gov
  3. 3
    Ameliorating effect of dipotassium glycyrrhizinate on an IL-4- and IL-13-induced atopic dermatitis-like skin-equivalent modelresearchgate.net
  4. 4
    Final report on the safety assessment of Glycyrrhetinic Acid, Potassium Glycyrrhetinate, Disodium Succinoyl Glycyrrhetinate, Glyceryl Glycyrrhetinate, Glycyrrhetinyl Stearate, Stearyl Glycyrrhetinate, Glycyrrhizic Acid, Ammonium Glycyrrhizate, Dipotassium Glycyrrhizate, Disodium Glycyrrhizate, Trisodium Glycyrrhizate, Methyl Glycyrrhizate, and Potassium Glycyrrhizinate.ncbi.nlm.nih.gov
  5. 5
    A comparative study of gluconolactone versus benzoyl peroxide in the treatment of acnencbi.nlm.nih.gov
  6. 6
    The Polyhydroxy Acid Gluconolactone Protects Against Ultraviolet Radiation in an In Vitro Model of Cutaneous Photoagingonlinelibrary.wiley.com
May Island 7 Days Secret Centella Cica Toner
May Island7 Days Secret Centella Cica Toner
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