I want to know the properties What ratio of water-soluble and oil-soluble extracts can be added in this Skin Barrier Cream base? The first one is 1. Centella Asiatica Extract 2. White Cumin 2x 3. Alpha Lipoic Acid 4. Rose Hip Oil
The purpose is to make a white + firming face serum, but I can't choose to use Base + Emulsifier . If you have a recommended formula, please ask.
thank you