The science
The evidence for this cream is really the evidence for urea, and it is deep. A 2021 review in Dermatology and Therapy summarised urea's emollient, moisturising, keratolytic, barrier-enhancing and antimicrobial properties: at low concentrations of around 2 to 10 percent it acts primarily as a humectant, binding water in the stratum corneum and improving barrier function; at higher concentrations it becomes keratolytic, loosening the connections between corneocytes and thinning hyperkeratotic skin. Gold Bond does not declare its dose, but urea's position as the second ingredient suggests it sits in the moisturising-to-mildly-keratolytic range rather than at callus-removing strength — consistent with the week-to-month timelines users report for softening rather than peeling. A 2018 review in Dermatologic Therapy on topical urea in skincare reached the same conclusions and noted urea's particular value on the feet, where hyperkeratosis and xerosis coexist.
The occlusive design has direct trial support in the population most affected. A 2017 randomized, double-blind, placebo-controlled study in Diabetic Medicine tested a urea-based moisturiser on xerosis and cracks of the feet in men and women with diabetes and found significant improvement in dryness and fissures versus placebo — evidence that the urea-plus-occlusive approach this cream uses works on exactly the heel skin it targets, though that trial used a fragrance-free product and this cream's menthol and fragrance make it unsuitable for diabetic feet in practice. Petrolatum and dimethicone are the occlusives with the longest record of reducing transepidermal water loss, and their pairing with glycerin and jojoba esters is conventional, sound foot-cream chemistry.
The sensory ingredients have a different kind of evidence. Menthol activates the TRPM8 cold receptor in cutaneous nerves, producing a cooling sensation and, as a 2016 study in Microvascular Research showed, a measurable increase in cutaneous blood flow — which is why tired feet feel relieved. None of that affects xerosis, and on broken skin the same nerve activation is experienced as stinging. The vitamins are present at conditioning doses with no expected clinical effect on heel skin.
References 3 ShowHide
- Urea in Dermatology: A Review of its Emollient, Moisturizing, Keratolytic, Skin Barrier Enhancing and Antimicrobial Properties — Dermatology and Therapy (2021)
- Treatment by a moisturizer of xerosis and cracks of the feet in men and women with diabetes: a randomized, double-blind, placebo-controlled study — Diabetic Medicine (2017)
- Topical menthol increases cutaneous blood flow — Microvascular Research (2016)