Panthenol

Panthenol (pro-vitamin B5) is a humectant/skin-conditioning agent typically used around 0.5–5% in moisturizers, barrier creams, and post-procedure products, where it is generally well tolerated and often helps reduce dryness-related irritation. Clinical experience and patch-test data suggest a very low rate of irritation or sensitization, but rare contact allergy/irritant reactions have been reported, especially on severely compromised eczema skin or in complex formulas. Given the need to account for high-sensitivity populations and avoid understating even uncommon reactions, it fits "very gentle" rather than inert. Safety Notes: In commercial skincare, panthenol (provitamin B5) is commonly used at very low levels (~0.05–0.2%) in mass-market lotions/cleansers primarily for mild conditioning and label claims, with many leave-on moisturizers and serums sitting around ~0.5–5% based on typical supplier guidance and product disclosures. The highest consumer-available, non-prescription products (e.g., “B5” repair serums, barrier creams, after-sun/soothing gels) are observed up to about 10% panthenol in leave-on formats; rinse-off products generally trend lower due to cost/benefit and wash-off, though similar low-end levels occur in both.

Suitability