Panthenol

Panthenol is 泛醇 (fàn chún) in Chinese, often labeled D-泛醇 or 维生素原B5 (provitamin B5); the Traditional Chinese form is the same. It's a vitamin B5 precursor that hydrates and helps repair the skin barrier.

Panthenol is the precursor (provitamin) of vitamin B5, and the two names are often used interchangeably. In the skin, panthenol converts to pantothenic acid (vitamin B5) before it can act. Formulas mostly use panthenol because it's more stable and absorbs more readily.

Not necessarily. 1–5% already delivers solid hydration and repair; 8–10% shows up mainly in targeted soothing serums and isn't essential. For everyday skincare, around 3–5% is plenty to feel a difference.

Absolutely. It has a high safety margin, no tolerance issues, and doesn't burden the skin. Sensitive skin and daily acid users can layer panthenol products long-term to maintain the barrier.

Very rarely. Panthenol is extremely gentle and doesn't clog pores, so acne-prone skin can use it too. If you're worried, trial it on a small patch of the T-zone first — most people have no issue.

Damp application or layering works best. After cleansing, while skin is still slightly damp, apply a panthenol toner or serum first, then seal with a lotion or cream to lock in more water. For very dry or sensitive skin, try a 10-minute compress soaked in panthenol serum.