http://feleciaroselabs.com/is-my-expensive-vitamin-c-serum-killing-my-skin/

Stable and nonacidic form of vitamin C that is effective as an antioxidant. Ascorbyl palmitate is particularly effective at reducing environmental damage.

Ascorbyl palmitate is an ester formed from ascorbic acid and palmitic acid creating a fat-soluble form of vitamin C. Not safe for fungal acne / Pityrosporum (Malassezia) Folliculitis bc esters are bad if they contain fatty acids that are within the C11-C24 range." Palmitic acid / Hexadecanoic acid: common saturated fatty acid found in fats and waxes including olive oil, palm oil, and body lipids. C16H32O2.

抗坏血酸棕榈酸酯遇到紫外线中的UVB可能会增加皮肤里面的自由基含量.