15C has a pH of ~ 3.5-4
Benefits:
- Powerful Antioxidant
- Skin brightening and lightening
- Wrinkle reduction
- Skin regeneration
- Plumper skin
Key Ingredients*:
- 15% Vit. C (L-Ascorbic Acid - ultra fine particles)
- 1% Ferulic Acid
- 1% Vit. E (Tocopherol)
- 0.5% Salicylic Acid
Directions for use: Apply 4-5 drops of 15C Serum to a dry face, neck and chest after cleansing. Use Propaira sunscreen before sun exposure.
Ingredients: Water, Ethoxy Diglycol, Ascorbic Acid, Pentylene Glycol, Polysorbate 20, Triethanolamine, PEG-40 Hydrogenated Castor Oil, Ferulic Acid, Tocopherol, Salicylic Acid, Xanthan Gum, Phenoxyethanol, Allantoin, Benzoic Acid, Dehydroacetic Acid Shop online
References: * Lin et al. Ferulic Acid Stabilizes a Solution of Vitamins C and E and Doubles its Photoprotection of Skin. THE JOURNAL OF INVESTIGATIVE DERMATOLOGY. DOI: 10.1111/j.0022-202X.2005.23768.x