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Flexitol Rescue Hard Skin & Callus Balm
Flexitol

Flexitol Rescue Hard Skin & Callus Balm

Efficacy100/100IrritancyMedium
See all ingredients

Works for

Exfoliation
Urea, Glycolic acid + 2 more
Works well
What the product description says
“The highly effective formula contains 22% Urea and a blend of Alpha Hydroxy Acids (AHA's) which deeply penetrate and gently exfoliate hard or callused skin, without harming the skin underneath.”
Source: Boots

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, salicylic acid.

UreaKey activeEffect: MediumNaturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations~9.4–11.5%
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~0.35–0.65%
Salicylic acidKey activeEffect: HighUsed 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)~0.3–0.55%
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)~1.1–1.3%
Moisturizing
Urea, Petrolatum + 12 more
Works well
What the product description says
“It works to restore moisturising ingredients to the skin, promoting the appearance of healthy looking skin and softer feet within 3 days.”
Source: Boots

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, sodium lactate.

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: caprylic/capric triglyceride, dimethicone.

The following ingredients in this product are especially good for supporting the skin barrier and helping with the hydration level: petrolatum, urea

UreaHero· HumectantEffect: HighNaturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations~9.4–11.5%
PetrolatumHero· Emollient, OcclusiveEffect: HighOne of the most effective and the most studied occlusive ingredients that creates a protective layer on top of the skin preventing moisture loss~1.6–2%
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~4.3–5.2%
Cetearyl alcoholKey active· EmollientEffect: MediumA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture~2.7–3.3%
Decyl oleateKey active· EmollientEffect: MediumHelps soften the upper layer of the skin~2.5–3%
Caprylic/capric triglycerideKey active· Emollient, OcclusiveEffect: HighA good mix of fatty acids that forms a protective layer on the skin. Improves the shelf life of products. Derived from coconut and glycerin~2.1–2.6%
Lanolin oilKey active· EmollientEffect: HighSebum of wool-bearing animals (most commonly sheep). Helps soften the upper layer of the skin and reduce the skin water loss. In rare cases could be an allergen. Not suitable for vegans~1.4–1.7%
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~0.8–1.2%
Cetyl palmitateKey active· EmollientEffect: MediumAn emollient that helps soften the skin and is used to improve product texture and stability~0.7–1.05%
DimethiconeKey active· Emollient, OcclusiveEffect: HighA silicone that helps to reduce water loss from the surface of the skin. Can temporarily "fill in" lines and wrinkles, absorb oil, and create a nice product finish~0.6–0.9%
Helianthus annuus seed oilKey active· Emollient, OcclusiveEffect: HighA great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function~0.2–0.4%
Glyceryl stearate· EmollientEffect: LowAn emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together~1.8–2.1%
Octyldodecanol· EmollientEffect: LowAn emollient that helps to soften the skin and create a pleasant product texture and stabilize the formulation~0.1–0.2%
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)~1.1–1.3%
Anti-aging
Side benefit · Glycolic acid, Lactic acid
Works well

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

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.

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~0.35–0.65%
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)~1.1–1.3%
Evens skin tone
Side benefit · Glycolic acid, Salicylic acid + 1 more
Works well

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

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.

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~0.35–0.65%
Salicylic acidEffect: LowUsed 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)~0.3–0.55%
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)~1.1–1.3%

Can it cause trouble?

Irritancy
1 strong irritant: Parfum
Medium risk
We flagged 9 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
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~0.35–0.65%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~0.3–0.55%est.
ParfumAn aromatic blend of unspecified and possibly irritating ingredientsHigh~0.1–0.2%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~2.1–2.6%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~1.1–1.3%est.
Sodium lactateHelps attract water to the upper layer of the skin. Is often used to adjust the pH level of the productMedium~0.8–1.2%est.
Ceteareth-20Helps oil and water mix together. Has some emollient propertiesMedium~0.7–1.05%est.
TriethanolamineUsed to adjust pH of the product and can help improve the product's smellMedium~0.6–0.9%est.
Tocopheryl acetateA more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.Medium~0.2–0.4%est.
Comedogenic
3 ingredients rated 2 or more on the 0–5 pore-clogging scale
3 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
Cetearyl alcoholA non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture2/5~2.7–3.3%est.
Decyl oleateHelps soften the upper layer of the skin2/5~2.5–3%est.
Ceteareth-20Helps oil and water mix together. Has some emollient properties2/5~0.7–1.05%est.
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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
Urea~9.4–11.5%
Hero · Moisturizing
Irritation risk
Low
Works for
MoisturizingExfoliation

Naturally present in skin (urea makes up about 7% of natural moisturizing factors in skin). Attracts water to the upper layer of the skin. Also has a positive effect on the skin barrier beyond the humectant action. Can enhance penetration of other ingredients. Is an exfoliating ingredient when used in high concentrations

More about Urea
Glycerin~4.3–5.2%
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
Cetearyl alcohol~2.7–3.3%
Key activeComedogenic 2/5
Irritation risk
Low
Comedogenicity
2/5
Works for
CleansingMoisturizing

A non-drying alcohol. Works as an emollient. Helps water and oil mix together and creates a nice product texture

More about Cetearyl alcohol
Decyl oleate~2.5–3%
Key activeComedogenic 2/5
Irritation risk
Low
Comedogenicity
2/5
Works for
Moisturizing

Helps soften the upper layer of the skin

More about Decyl oleate
Caprylic/capric triglyceride~2.1–2.6%
Key activeIrritant · 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
Glyceryl stearate~1.8–2.1%
Formula
Irritation risk
Low
Works for
CleansingMoisturizing

An emollient that softens the skin and forms a protective layer on its surface. Helps water and oil mix together

More about Glyceryl stearate
Petrolatum~1.6–2%
Hero · Moisturizing
Irritation risk
Low
Works for
Moisturizing

One of the most effective and the most studied occlusive ingredients that creates a protective layer on top of the skin preventing moisture loss

More about Petrolatum
Lanolin oil~1.4–1.7%
Key active
Irritation risk
Low
Works for
Moisturizing

Sebum of wool-bearing animals (most commonly sheep). Helps soften the upper layer of the skin and reduce the skin water loss. In rare cases could be an allergen. Not suitable for vegans

More about Lanolin oil
Lactic acid~1.1–1.3%
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
Sodium lactate~0.8–1.2%
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
Cetyl palmitate~0.7–1.05%
Key active
Irritation risk
Low
Works for
Moisturizing

An emollient that helps soften the skin and is used to improve product texture and stability

More about Cetyl palmitate
Ceteareth-20~0.7–1.05%
Comedogenic 2/5Irritant · medium
Irritation risk
Medium
Comedogenicity
2/5
Works for
Cleansing

Helps oil and water mix together. Has some emollient properties

More about Ceteareth-20
Triethanolamine~0.6–0.9%
Irritant · medium
Irritation risk
Medium
Works for
Cleansing

Used to adjust pH of the product and can help improve the product's smell

More about Triethanolamine
Dimethicone~0.6–0.9%
Key active
Irritation risk
Low
Works for
MoisturizingMattifying

A silicone that helps to reduce water loss from the surface of the skin. Can temporarily "fill in" lines and wrinkles, absorb oil, and create a nice product finish

More about Dimethicone
Phenoxyethanol~0.45–0.65%
Formula
Irritation risk
Low

A preservative. It helps prevent bacterial growth in cosmetic products

More about Phenoxyethanol
Glycolic acid~0.35–0.65%
Key activeIrritant · high
Irritation risk
High
Works for
Anti-agingEvens skin toneExfoliationAnti-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
Salicylic acid~0.3–0.55%
Key activeIrritant · 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
Malic acid~0.25–0.5%
Formula
Irritation risk
Low

Helps adjust the product pH

More about Malic acid
Tocopheryl acetate~0.2–0.4%
Irritant · medium
Irritation risk
Medium
Works for
Anti-oxidation

A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.

More about Tocopheryl acetate
Helianthus annuus seed oil~0.2–0.4%
Key active
Irritation risk
Low
Works for
Moisturizing

A great emollient due to its high linoleic acid content. One of the most effective plant oils in helping skin hydration and repairing skin barrier function

More about Helianthus annuus seed oil
Carbomer~0.15–0.25%
Formula
Irritation risk
Low
Works for
Cleansing

Helps create a thicker or gel-like product texture. It is not a surfactant but can be used in gentle cleansing formulations

More about Carbomer
Parfum~0.1–0.2%
Irritant · high
Irritation risk
High

An aromatic blend of unspecified and possibly irritating ingredients

More about Parfum
Octyldodecanol~0.1–0.2%
Formula
Irritation risk
Low
Works for
Moisturizing

An emollient that helps to soften the skin and create a pleasant product texture and stabilize the formulation

More about Octyldodecanol
Stearamidopropyl dimethylamine stearate~0.1–0.15%
Formula
Irritation risk
Low
Works for
Cleansing
More about Stearamidopropyl dimethylamine stearate
Ingredient list view

Water, Urea, Glycerin, Cetearyl alcohol, Decyl oleate, Caprylic/capric triglyceride, Glyceryl stearate, Petrolatum, Lanolin oil, Lactic acid, Sodium lactate, Cetyl palmitate, Ceteareth-20, Triethanolamine, Dimethicone, Phenoxyethanol, Glycolic acid, Salicylic acid, Malic acid, Tocopheryl acetate, Helianthus annuus seed oil, Carbomer, Parfum, Octyldodecanol, Stearamidopropyl dimethylamine stearate

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🇬🇧 Amazon UK (UK)Price as of 11/8 06:55 GMT
≈ $7.50
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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
FlexitolRescue Hard Skin & Callus BalmYOUR PRODUCTDeborah LippmannGet Off Callus Softener Intensive TreatmentPrequelFOOT RESCUEKerasalIntensive Foot Repair Ointment
Match—82%81%73%
Price—$35.45$18.00$8.84
Shared key ingredients—5 of 115 of 114 of 11
Key difference——Mandelic Acid—
Irritancy Medium Low Low Low
Drying alcohol————
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Product summary

"Flexitol - Rescue Hard Skin & Callus Balm" is effective for: Moisturizing, Anti-aging, Evens skin tone and Exfoliation

Ingredient callouts

  • This product contains acids (glycolic acid 0.35% - 0.65% and lactic acid 1.10% - 1.30%). 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). Lactic acid is particularly good in attracting water to the upper layer of the skin and improving the skin barrier.

Price

The product retails for 6.99£ in the United Kingdom.

For a detailed price comparison: click here.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 17 studies and safety reviews.

  1. 1
    Topical urea in skincare: A reviewpubmed.ncbi.nlm.nih.gov
  2. 2
    Glycerol and the skin: holistic approach to its origin and functionsncbi.nlm.nih.gov
  3. 3
    Epidermal and dermal effects of topical lactic acidncbi.nlm.nih.gov
  4. 4
    Dual Effects of Alpha-Hydroxy Acids on the Skinpdfs.semanticscholar.org
  5. 5
    Dimethicone as a protective ingredient in topical medicationsjaad.org
  6. 6
    Final Report on the Safety Assessment of Dimethicone Copolyoljournals.sagepub.com
Flexitol Rescue Hard Skin & Callus Balm
FlexitolRescue Hard Skin & Callus Balm
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Find on Amazon

As an Amazon Associate, WIMJ earns from qualifying purchases.