Vitamin A (Retinol): at least 2-3% concentration.
Vitamin C: at least 10% concentration, PH 2-3.
Vitamin E: at least 5% concentration.
BHA: at least 1-2% concentration, PH 3-4.
AHA: at least 5-8% concentration, PH 3-4.
各种护肤成分的有效浓度
雪儿 (2004-11-18 15:25:32) 评论 (1)Vitamin A (Retinol): at least 2-3% concentration.
Vitamin C: at least 10% concentration, PH 2-3.
Vitamin E: at least 5% concentration.
BHA: at least 1-2% concentration, PH 3-4.
AHA: at least 5-8% concentration, PH 3-4.