Vitamin C Formulation Questions

Here are the answers to your questions regarding formulating Vitamin C serum with L-Ascorbic Acid:

1. Mixing Glutathione with Vitamin C in water: If you plan to use the mixture within 2-3 days, it is not necessary to add Glutathione. Glutathione, such as Glutathione (L-Glutathione) (Extrasol), is expensive and primarily beneficial for stabilizing the product for long-term storage. For short-term use, you can mix Vitamin C directly with water. You do not need to adjust the pH if the product is for personal use and not for commercial sale.

2. Mixing Vitamin C directly in water for 2-3 days: Yes, you can mix L-Ascorbic Acid directly in water if you intend to use it within 2-3 days. For this purpose, you do not need to adjust the pH if it's for personal use. Using Vitamin C (L-ascorbic acid) (Standard) or Vitamin C (L-ascorbic acid) (Fine) is sufficient.

3. Vitamin C (L-ascorbic acid) vs. Vitamin C (L-ascorbic acid) Ultra-Fine: Yes, Vitamin C (L-ascorbic acid) and Vitamin C (L-ascorbic acid) (Ultra-Fine) are from the same family, which is L-Ascorbic Acid. The difference lies in the particle size. The Ultra-Fine grade has a much smaller particle size (smaller than 45 microns) compared to the Standard or Fine grades. While Ultra-Fine (Vitamin C (L-ascorbic acid) (Ultra-Fine)) disperses very easily and is suitable for formulas without water, the Standard (Vitamin C (L-ascorbic acid) (Standard)) or Fine (Vitamin C (L-ascorbic acid) (Fine)) grades are generally sufficient and more cost-effective for dissolving directly in water for your intended short-term use.