Ren Skincare Ready Steady Glow AHA Toner

Ren Skincare Ready Steady Glow AHA Toner

Efficacy91/100IrritancyHigh

Works for

Exfoliation
Lactic acid, Salix nigra bark extract
Works well
What the product description says
“A toner that exfoliates, visibly brightens and tightens, and hydrates for a smooth, even-, and energized-looking complexion with a fresh, cucumber scent.”
Source: Sephora CA

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: lactic acid.

Lactic acidKey activeEffect: HighAn 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)~3.4–5.1%
Salix nigra bark extractEffect: LowA plant extract that might contain salicylic acid~0.8–1.2%
Evens skin tone
Lactic acid, Potassium azeloyl diglycinate
Works well
What the product description says
“Its lactic acid and willow bark extract work together to visibly smooth and tone skin as well as reduce the look of pores while azelaic acid visibly brightens and lightens the appearance of hyperpigmentation.”
Source: Sephora CA

This product can help reduce hypepigmentation and even out the skin tone because it contains the following effective ingredients: lactic acid, potassium azeloyl diglycinate

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.

Lactic acidKey activeEffect: HighAn 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)~3.4–5.1%
Potassium azeloyl diglycinateKey activeEffect: HighA derivative of azelaic acid. It is obtained by reacting the chloride of azelaic acid with two molecules of glycine (an amino acid) and potassium hydroxide. It is less studied than azelaic acid, but the available research suggests that it also can be effective in reducing skin redness, hyperpigmentation and blemishes. There are claims that it is more bio-available and more effective than azelaic acid, but no comparison study is available. Potassium azeloyl diglycinate is better soluble in water compared with azelaic acid. Because of this property, products with potassium azeloyl digclycinate can have a nicer texture~2.1–3.1%
Moisturizing
Lactic acid, Lactobacillus ferment + 6 more
Works
What the product description says
“A toner that exfoliates, visibly brightens and tightens, and hydrates for a smooth, even-, and energized-looking complexion with a fresh, cucumber scent.”
Source: Sephora CA

This product can help improve hydration of the skin with the two types of ingredients.

The first type is called “humectants”:
these ingredients help attract water. 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. The following ingredients in this product do the job: glycerin, lactic acid.

This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: cocos nucifera fruit extract.

Lactic acidKey active· HumectantEffect: HighAn 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)~3.4–5.1%
Lactobacillus fermentKey active· HumectantEffect: HighA fermentation product created by bacteria Lactobacillus. The fermented product has anti-bacterial properties and might be helpful in calming down inflammation, but studies are lacking. Helps attract water to the upper layer of the skin. Can be used as a preservative~2.7–4%
Potassium azeloyl diglycinateKey activeEffect: MediumA derivative of azelaic acid. It is obtained by reacting the chloride of azelaic acid with two molecules of glycine (an amino acid) and potassium hydroxide. It is less studied than azelaic acid, but the available research suggests that it also can be effective in reducing skin redness, hyperpigmentation and blemishes. There are claims that it is more bio-available and more effective than azelaic acid, but no comparison study is available. Potassium azeloyl diglycinate is better soluble in water compared with azelaic acid. Because of this property, products with potassium azeloyl digclycinate can have a nicer texture~2.1–3.1%
LactobacillusKey activeEffect: HighA non-living ingredient made by fermentation with the bacteria Lactobacillus. It can help attract water to the upper layer of the skin and might help reduce inflammation~1.1–1.7%
Cocos nucifera fruit extractKey active· EmollientEffect: HighAn emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic~0.4–0.9%
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~0.2–0.7%
Cucumis sativus fruit extractEffect: Low, below effective doseMight be somewhat helpful in reducing hyperpigmentation and neutralizing free radicals but its typical concentration in a product is too low for having an effect~0.5–1.2%
Caprylic/capric triglycerideUnder-dosedA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin~0.35–0.85%
Anti-aging
Side benefit · Lactic acid
May help

This product contains lactic acid. This ingredient might be able to help reduce and prevent fine lines and wrinkles, improve skin elasticity and firmness, but there is not enough evidence that it actually works.

Lactic acidKey activeEffect: MediumAn 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)~3.4–5.1%
Anti-blemish
Side benefit the brand mentions · Potassium azeloyl diglycinate
May help
What the product description says
“Dark Spots, Pores, and Acne and Blemishes Formulation.”
Source: Sephora CA

This product might be able to help reduce blemishes and clogged pores because it contains potassium azeloyl diglycinate.

Potassium azeloyl diglycinateKey activeEffect: HighA derivative of azelaic acid. It is obtained by reacting the chloride of azelaic acid with two molecules of glycine (an amino acid) and potassium hydroxide. It is less studied than azelaic acid, but the available research suggests that it also can be effective in reducing skin redness, hyperpigmentation and blemishes. There are claims that it is more bio-available and more effective than azelaic acid, but no comparison study is available. Potassium azeloyl diglycinate is better soluble in water compared with azelaic acid. Because of this property, products with potassium azeloyl digclycinate can have a nicer texture~2.1–3.1%

Can it cause trouble?

Irritancy
3 strong irritants: Parfum, Limonene + 1 more — patch-test recommended
High risk
We flagged 12 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.1–0.3%est.
LimoneneA common frangrance that can easily irritate skin, especially if exposed to air, light or heatHigh~0.05–0.1%est.
LinaloolA fragrance. Can be irritatingHigh~0.01–0.1%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~3.4–5.1%est.
EthylhexylglycerinA preservativeMedium~1.4–2%est.
Levulinic acidHelps stabilize a product formulationMedium~0.9–1.4%est.
Salix nigra bark extractA plant extract that might contain salicylic acidMedium~0.8–1.2%est.
Cucumis sativus fruit extractMight be somewhat helpful in reducing hyperpigmentation and neutralizing free radicals but its typical concentration in a product is too low for having an effectMedium~0.5–1.2%est.
Caprylic/capric triglycerideA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerinMedium~0.35–0.85%est.
Sodium levulinateA preservativeMedium~0.1–0.5%est.
Citric acidCan work as an exfoliant but is typically used to adjust the product pHMedium~0.05–0.25%est.
Potassium sorbateA preservativeMedium~0.05–0.25%est.
Comedogenic
1 ingredient rated 2 or more on the 0–5 pore-clogging scale
1 flagged
These ingredients have a comedogenic rating of 2 or more on a 0–5 scale; the table shows each one's rating. In leave-on products they can clog pores in acne-prone skin.
IngredientFunctionRatingEst. amount
Cocos nucifera fruit extractAn emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic3/5~0.4–0.9%est.

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Ingredients

Filter by role to see what each ingredient is doing.

Water~40–60%
Formula
Irritation risk
Low

Plain old water

More about Water
Polysorbate 20~5.1–7.6%
Formula
Irritation risk
Low
Works for
Cleansing

Helps oil and water mix together

More about Polysorbate 20
Lactic acid~3.4–5.1%
Key activeIrritant · 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
Lactobacillus ferment~2.7–4%
Key active
Irritation risk
Low
Works for
MoisturizingAnti-inflammatoryAnti-oxidationReduces irritation

A fermentation product created by bacteria Lactobacillus. The fermented product has anti-bacterial properties and might be helpful in calming down inflammation, but studies are lacking. Helps attract water to the upper layer of the skin. Can be used as a preservative

More about Lactobacillus ferment
Potassium azeloyl diglycinate~2.1–3.1%
Key active
Irritation risk
Low
Works for
Anti-inflammatoryEvens skin toneAnti-blemishMoisturizing

A derivative of azelaic acid. It is obtained by reacting the chloride of azelaic acid with two molecules of glycine (an amino acid) and potassium hydroxide. It is less studied than azelaic acid, but the available research suggests that it also can be effective in reducing skin redness, hyperpigmentation and blemishes. There are claims that it is more bio-available and more effective than azelaic acid, but no comparison study is available. Potassium azeloyl diglycinate is better soluble in water compared with azelaic acid. Because of this property, products with potassium azeloyl digclycinate can have a nicer texture

More about Potassium azeloyl diglycinate
Sodium hydroxide~1.6–2.5%
Formula
Irritation risk
Low

Used to adjust the product's pH

More about Sodium hydroxide
Ethylhexylglycerin~1.4–2%
Irritant · medium
Irritation risk
Medium

A preservative

More about Ethylhexylglycerin
Lactobacillus~1.1–1.7%
Key active
Irritation risk
Low
Works for
Moisturizing

A non-living ingredient made by fermentation with the bacteria Lactobacillus. It can help attract water to the upper layer of the skin and might help reduce inflammation

More about Lactobacillus
Levulinic acid~0.9–1.4%
Irritant · medium
Irritation risk
Medium

Helps stabilize a product formulation

More about Levulinic acid
Salix nigra bark extract~0.8–1.2%
Irritant · medium
Irritation risk
Medium
Works for
Exfoliation

A plant extract that might contain salicylic acid

More about Salix nigra bark extract
Cucumis sativus fruit extract~0.5–1.2%
Irritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-oxidation

Might be somewhat helpful in reducing hyperpigmentation and neutralizing free radicals but its typical concentration in a product is too low for having an effect

More about Cucumis sativus fruit extract
Sodium benzoate~0.25–0.5%
Formula
Irritation risk
Low

A preservative

More about Sodium benzoate
Cocos nucifera fruit extract~0.4–0.9%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

An emollient. Found to be as effective as a moisturizer for dry skin as mineral oil. Could be comedogenic

More about Cocos nucifera fruit extract
Caprylic/capric triglyceride~0.35–0.85%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
Moisturizing

A good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin

More about Caprylic/capric triglyceride
Glycerin~0.2–0.7%
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
Sodium levulinate~0.1–0.5%
Irritant · medium
Irritation risk
Medium

A preservative

More about Sodium levulinate
Parfum~0.1–0.3%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Citric acid~0.05–0.25%
Irritant · medium
Irritation risk
Medium

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

More about Citric acid
Potassium sorbate~0.05–0.25%
Irritant · medium
Irritation risk
Medium

A preservative

More about Potassium sorbate
Limonene~0.05–0.1%
Irritant · high
Irritation risk
High

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

More about Limonene
Linalool~0.01–0.1%
Irritant · high
Irritation risk
High

A fragrance. Can be irritating

More about Linalool
Ingredient list view

Water, Polysorbate 20, Lactic acid, Lactobacillus ferment, Potassium azeloyl diglycinate, Sodium hydroxide, Ethylhexylglycerin, Lactobacillus, Levulinic acid, Salix nigra bark extract, Cucumis sativus fruit extract, Sodium benzoate, Cocos nucifera fruit extract, Caprylic/capric triglyceride, Glycerin, Sodium levulinate, Parfum, Citric acid, Potassium sorbate, Limonene, Linalool

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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
Ren SkincareReady Steady Glow AHA TonerYOUR PRODUCTPersonal DayDoing the Work Acne TreatmentAllies of SkinFounder's Essence 56 Ellagic & P.A.D. Light Reflecting FluidDr. BrandtDark Spots No More Triple Acid Spot Minimising Concentrate
Match—86%77%76%
Price——$110.00$63.27
Shared key ingredients—3 of 73 of 72 of 7
Key difference—NiacinamidePanthenolNiacinamide
Irritancy High Low Medium Low
Drying alcohol————
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Ren Skincare Ready Steady Glow AHA Toner
Ren SkincareReady Steady Glow AHA Toner

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As an Amazon Associate, WIMJ earns from qualifying purchases.