Doctor-dispensed · Made in the USA

Thick, cracked heels don’t need another thin lotion — maximum-strength 42% urea.

Derm 42 is a 4 oz foot repair cream with 42% urea plus unrefined mango and shea butters. Fragrance-free. Paraben-free. Softens thick, dry, cracked skin and helps lock in moisture. The jar includes a free pumice stone and brush. Use once a day after bathing.

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MONEY BACK GUARANTEE Derm 42 Skin Care
  • 42% urea — maximum-strength foot repair cream
  • Unrefined mango butter + shea butter to help seal moisture
  • Free pumice stone and brush included with every jar
  • 100% money-back — even if opened, no product return needed
$29.95 $36.95

4 oz jar · Includes pumice + brush · SKU D-42-1

Free shipping. Questions: 801-923-3878. Not satisfied? Full money-back — opened jar does not have to be returned.

  • USA manufactured
  • 42% urea
  • Fragrance-free
  • Doctor-dispensed
  • Pumice + brush included
See the heel

Drag to compare before and after.

Illustrative heel photos showing thick, cracked skin versus smoother, softer-looking feet after consistent care. Individual results vary.

Illustrative results. Individual results vary. Consistent daily use.

The real problem

Cracked heels don’t soften from thin lotion alone.

Thick, callused skin on heels and feet is stubborn. Ordinary drugstore lotions often sit on top of hardened skin and bounce off. Cosmetic urea at 5–10% is a different job than a high-concentration 42% urea cream built to hydrate and help soften hard keratin.

Cracked heels

Dry fissures and rough edges make shoes uncomfortable and socks catch. Softening the thick layer is step one.

Thin lotions bounce off

Hardened callus doesn’t drink water the way soft skin does. Lightweight lotions feel nice for a minute and leave the thick spots untouched.

5–10% isn’t 42%

Lower-dose urea moisturizers and a maximum-strength 42% urea cream are not the same concentration job. Derm 42 is built for thick, dry, cracked skin.

How it works

Hydrate. Soften. Seal. Then gentle pumice.

Urea pulls in moisture and helps soften hard keratin. Mango and shea butters help seal that moisture in. Once daily after showering — preferably before bed — then use the pumice and brush gently on softened dead skin.

The once-daily path

42% urea Humectant + keratolytic — helps hydrate and soften thick dry skin
Mango + shea Unrefined butters help lock moisture into softened skin
Pumice + brush Gently remove softened dead skin — never on open or bleeding cracks

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The science of urea

Your skin already runs on urea. Thick heels often don’t have enough of it — and 42% is a different job than a 10% lotion.

This is ingredient research on urea in dermatology — how the molecule behaves in the outer skin layer — not a claim that Derm 42 treats, cures, or prevents any disease.

What urea actually is

Urea is a small, water-loving (hygroscopic) molecule. In healthy skin it is a core part of natural moisturizing factor (NMF) sitting in the stratum corneum — the dead, protective outer layer that should stay flexible.

When that layer is dry and thickened, NMF — including urea — is often low. Water leaves. Keratin stiffens. Heels crack at the edges because the thick plate can’t bend. A thin lotion that only sits on top doesn’t refill that water-binding job.

Two jobs, one molecule — it depends on the dose

About 2–10%Mostly a humectant. Draws water into the stratum corneum and helps a light moisturizer feel like it “soaks in.” Fine for everyday dryness. Not the same job as maximum-strength cream on callused heels.
Over ~10%Reviews describe an added keratolytic action: urea starts to loosen the protein structure of thickened keratin, not just add water.
40–50%The high-concentration range researched for localized, stubborn hyperkeratosis. Derm 42 is 42% urea — that end of the ladder, which is why we say once daily, not all over the body like a lotion.

How the keratolytic effect works

Keratin is the tough protein that makes callus feel like a plate. Clinical literature describes urea disrupting hydrogen bonds and unfolding that protein so the outer layer can disperse and soften — without the same “acid burn” story as some other keratolytics.

A 2001 stratum-corneum test found 40% urea keratolytic in a standardized silver-nitrate model. A 2002 RCT of 40% urea cream vs 12% ammonium lactate for xerosis found urea ahead at day 14 on roughness, fissures, thickness, and dryness. That’s 40% urea research, not a Derm 42 trial.

Water in, barrier support, then butters

Because urea binds water, reviews also discuss barrier-related effects: less water loss through the outer layer, and — in newer work — urea signaling in keratinocytes (including genes tied to differentiation and antimicrobial peptides). That’s why high-concentration urea is framed as more than a peel.

Derm 42 then uses mango and shea butters as emollients to help seal moisture after urea has hydrated and softened. High urea can sting more than a 10% cream; keep the lid tight (urea crystallizes if left open) and stop if irritation shows up.

Sources: Piquero-Casals 2021 (PMID 34596890), Celleno 2018 (PMID 30378232), Starace 2020 (PMID 33249711), Pan 2013 (PMID 24314769), Gloor 2001 (PMID 11683130), Ademola 2002 (PMID 11978141), Loden 2003 (PMID 14572299). Individual results vary.

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What’s in the jar

42% urea up front. Butters and humectants behind it.

Use once daily on clean, dry skin after showering — preferably before bed. High urea — don’t overuse. Fragrance-free. Paraben-free. 4 oz jar includes free pumice stone and brush.

42%
Urea

Urea is a small, water-loving molecule your skin already makes as part of natural moisturizing factor (NMF) in the outer layer. Dry, thickened skin often runs low on it. At 42%, topical urea is researched as both a humectant (pulls and holds water) and a keratolytic (helps loosen hard keratin so thick, dry skin can soften). Ingredient research, not a claim that Derm 42 treats a disease.

Research
  • Piquero-Casals et al. 2021 — urea in dermatology: emollient, moisturizing, keratolytic, barrier, and antimicrobial roles (review). PMID 34596890
  • Pan et al. 2013 — urea: a comprehensive review of the clinical literature (systematic review). PMID 24314769
  • Ademola et al. 2002 — RCT: 40% urea cream vs 12% ammonium lactate for xerosis; day 14 urea superior on roughness, fissures, thickness, and dryness. PMID 11978141
  • Parker et al. 2017 — systematic review of moisturisers for foot xerosis; urea was the most researched ingredient (14 studies). The review could not rank one ingredient over another due to study quality. PMID 28191040
  • Celleno 2018 — topical urea in skincare review: lower doses moisturize; higher concentrations (>10%) exert keratolytic action. PMID 30378232
  • Starace et al. 2020 — clinical evidence for high-concentration urea on hyperkeratotic skin (keratolytic, moisturizing, emollient). PMID 33249711
  • Gloor et al. 2001 — 40% urea was keratolytic in a standardized stratum-corneum test (high-dose urea NRF formulations). PMID 11683130
  • Loden 2003 — review of emollients and moisturizers for dry-skin barrier; urea-containing moisturizers studied for TEWL and irritation resistance. PMID 14572299
  • Gloor et al. 2002 — urea / ammonium lactate combinations studied for skin hydration and protection vs either component alone. PMID 11803256
  • RCT (JAPMA 2025) — 40% urea used as the comparator for pedal (heel) fissures; both 40% urea and a barrier cream improved fissures over 28 days (48 completers). Ingredient research, not a Derm 42 outcome claim. PMID 41166120
  • Federici et al. 2015 — RCT: urea-containing cream vs glycerol emollient for severe foot xerosis in type 2 diabetes (urea combo, not 42%). Greater hydration with the urea cream. PMID 25851453
Butters
Mango + shea

Unrefined Mangifera indica (mango) butter and Butyrospermum parkii (shea) butter — emollients in the formula that help seal moisture after urea softens thick dry skin. Cited here as ingredient research, not a claim that Derm 42 treats eczema or any disease.

Research
  • Hon et al. 2015 — cream containing shea butter extract studied for skin hydration and acceptability (pediatric eczema; not a Derm 42 disease-treatment claim). PMID 26314567
Support
Aloe, glycerin, vitamin E

Aloe vera gel juice, glycerin, and tocopheryl acetate support the cream’s moisturizing feel. Glycerin is a classic humectant used in topical skincare.

Research
  • Fluhr et al. 2008 — glycerol and the skin: review of hydration, barrier, and related functions. PMID 18510666
  • Loden 2003 — moisturizers with humectants (including urea) studied for dry-skin barrier function; relevant background for glycerin’s humectant role. PMID 14572299
Foot-shaped pumice stone and brush included with every Derm 42 jar
Free
Pumice stone + brush

Included with every jar. After the cream has softened dead skin, gently buff — never on open, bleeding, or infected cracks. Talk with a clinician first if you have diabetes or neuropathy.

Full ingredients (INCI): Aqua (Deionized Water), Urea, Aloe Barbadensis Leaf (Aloe Vera Gel) Juice, Polyacrylamide, C13-14 Isoparaffin, Laureth-7, Isopropryl Myristate, Polysorbate-20, Glycerin, Caprylic/Capric Triglyceride, Tocopheryl Acetate (Vitamin E), Butyrospermum Parkil (Shea) Butter, Cetyl Alcohol, C12-15 Alkyl Benzoate, Mangifera Indica (Mango) Butter, Sodium PCA, Phenoxyethanol, Ethylhexylglycerin. Fragrance-free. Paraben-free. For external use only. Avoid eyes and mucous membranes. Do not use on broken or bleeding skin without clinician guidance. Keep out of reach of children.

How to use

Watch: how to use it — what to expect
  1. 1Shower or bathe. Pat skin clean and dry.
  2. 2Apply a thin layer of Derm 42 to thick, dry, cracked areas — heels, feet, or rough skin. Prefer before bed.
  3. 3Let the cream work. High urea — once daily is enough; don’t overuse.
  4. 4When skin feels softened, gently use the pumice and brush on dead skin only — never on open or bleeding cracks.
What to expect

Once a day. Soften, then gently buff.

This is a daily cream routine — not a 90-day capsule protocol. Consistent use matters. Individual results vary.

1
Tonight

Apply after shower

Clean, dry skin. Thin layer on thick dry areas. Prefer before bed so it can work overnight.

2
Days

Skin softens

Urea helps hydrate and soften hard keratin. Butters help lock moisture. Keep the lid tight — crystals can form if left open.

3
Ongoing

Gentle pumice

Once softened, gently buff dead skin with the included pumice and brush. Stop if skin is open, bleeding, or irritated.

Verified buyers
4.6 59 reviews

Ratings from people who bought Derm 42.

Customer reviews from verified buyers. Individual results vary. Not a guarantee of specific outcomes.

From the clinic

Dr. Davinder Bhela, DPM, on why he dispenses Derm 42.

Owner of Restore Podiatry in Long Island, New York. His words, not ours. Individual results vary.

Dr. Davinder Bhela, DPM — Restore Podiatry
The honest comparison

Thin lotion vs waiting vs Derm 42.

Thin drugstore lotionWaiting it outDerm 42
Urea strengthOften none or 5–10%42% urea
Tools includedUsually nonePumice + brush included
FeelOften watery / greasyNon-greasy / fast absorbing
FragranceOften scentedFragrance-free
DownsideHardened skin barely noticesCracks stay roughMoney-back if not satisfied

Urea strength

Thin drugstore lotionOften none or 5–10%

Waiting it out

Derm 4242% urea

Tools included

Thin drugstore lotionUsually none

Waiting it out

Derm 42Pumice + brush included

Feel

Thin drugstore lotionOften watery / greasy

Waiting it out

Derm 42Non-greasy / fast absorbing

Fragrance

Thin drugstore lotionOften scented

Waiting it out

Derm 42Fragrance-free

Downside

Thin drugstore lotionHardened skin barely notices

Waiting it outCracks stay rough

Derm 42Money-back if not satisfied

Cosmetic foot care cream. Helps soften thick, dry, cracked skin and support a moisture barrier. Not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Talk with your clinician if you have diabetes, open wounds, or infection.

Risk reversal

Try Derm 42. If you’re not satisfied, you get a full refund.

100% money-back. If you’ve opened the jar, you do not need to return the product — tell us and we’ll refund. This is a once-daily cream, not a 90-day protocol.

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Objections, answered

The questions that actually stop the order.

How often should I use it?

Once daily on clean, dry skin after showering — preferably before bed. Derm 42 is high urea (42%); don’t overuse. A thin layer is enough.

What does urea do?

Urea is one of the skin’s own natural moisturizing factor (NMF) ingredients in the stratum corneum — the outer layer. It is hygroscopic: it attracts and holds water, which is why even modest concentrations are used as moisturizers.

At higher concentrations (generally over 10%), research describes a keratolytic effect: urea can unfold and disperse keratin by disrupting hydrogen bonds, so thick, hardened skin becomes easier to soften. Reviews put 40–50% urea in the range used for localized, stubborn hyperkeratosis. Derm 42 is 42% — that high-concentration cosmetic job, not a 5–10% lotion.

High-concentration urea can sting or irritate more than a light moisturizer, which is why we say once daily after bathing. Ingredient research, not a disease-treatment claim.

I see crystals if I leave the lid open?

Yes — close the lid tightly and store at room temperature. Urea can crystallize if the jar is left open. That doesn’t mean the product is ruined; keep it sealed between uses.

How do I use the pumice and brush?

After the cream has softened dead skin, gently buff with the pumice and brush. Do not use on open, bleeding, or infected cracks. If you have diabetes, neuropathy, or poor circulation, talk with your clinician before using abrasive tools on your feet.

What if I subscribe and then want out?

Skip a shipment or cancel anytime. You don’t need to email us to stop the next jar. Subscribe & Save is 10% off with automatic 25-day refills.

How do I order if I’d rather not do it online?

Call 801-923-3878 or email support@freelifelabs.com. Doctor-dispensed — ask your clinic if they carry Derm 42.

Who is this for?

Adults with thick, dry, cracked heels, feet, or rough skin who want a maximum-strength 42% urea cream with mango and shea butters. Talk to a clinician if you have diabetes, open wounds, or infection. Not for broken or bleeding skin without clinician guidance. If that’s not you, don’t buy it.

What’s your return policy?

Full refund. If you’ve opened the jar, you do not need to return the product — contact us and we’ll refund.

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Derm 42 Skin Care

Start Derm 42 — money-back if you’re not satisfied.

42% urea. Pumice + brush included. Free shipping. $29.95.

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Derm 42
$29.95 · Money-back guarantee