Panthenol (Pro-Vitamin B5)
Skincare ingredient, decoded — every claim sourced.
What it is
A water-attracting, barrier-soothing ingredient that helps skin hold moisture and feel calmer and smoother.
How it works
When applied to skin, panthenol is absorbed into the surface layer (stratum corneum) and converted to pantothenic acid (vitamin B5), a building block of coenzyme A that supports the normal function of the skin's surface (epithelial) cells. It works in two complementary ways: as a humectant it draws and holds water in the upper skin, and as a barrier supporter it helps reduce transepidermal water loss so that moisture stays in. This combination is consistent with why it can leave the look and feel of stressed or dry skin calmer, softer and more hydrated, and why surface feel and smoothness tend to improve over continued use.
Works well with
Hyaluronic AcidNiacinamideCeramidesGlycerinCentella Asiatica (Madecassoside)Allantoin
Who should take care
Almost no one needs to avoid it; it is well tolerated even on sensitive and stressed skin. As with any ingredient, rare allergic contact reactions are possible, so anyone with a known panthenol or pantothenic-acid allergy should skip it, and discontinue use if redness or itching appears.
🔒 IN THE APP
The dose that actually works — and is it right for your skin?
The concentration that actually makes a difference, and whether this fits YOUR skin profile, lives in the MHS BLOOM app.
Sources
- Biro et al. (2003), Efficacy of dexpanthenol in skin protection against irritation: a double-blind, placebo-controlled study, Contact Dermatitis — 5% panthenol supported surface (stratum-corneum) hydration measured by corneometry versus placebo after an SLS surfactant challenge
- Scott et al. (CIR Expert Panel) (2022), Safety Assessment of Panthenol, Pantothenic Acid, and Derivatives as Used in Cosmetics, Int J Toxicol (PMID 36177798) — concluded these ingredients are safe in the present practices of use and concentration; highest reported leave-on use about 5.3% (body/hand products); humectant and skin-conditioning function
- Gorski, Proksch, Baron, Schmid & Zhang (2020), review in Pharmaceuticals (Basel) — topical panthenol is absorbed and converted to pantothenic acid / coenzyme A, supporting the skin's surface (epithelial) cells; describes the humectant plus barrier-supporting role and reduced transepidermal water loss at a 5% dose
- Gao et al. (2025), Double-Blind Randomized Controlled Study of a Panthenol-Enriched Mask, J Cosmet Dermatol — panthenol formula showed significantly higher surface (stratum-corneum) hydration and lower transepidermal water loss versus control
This is not medical advice at all — cosmetic information only. Not suitable during pregnancy or breastfeeding; always consult your doctor.