Hello, want to study, consult the r&d team in case of wanting to adjust the stabilized
vit c natural glycol, you can request the FDA. But seeing the instructions on the product page says that the formula cannot be modified in any way except
น้ำหอม and color, including ph, do not meet the requirements of FDA. In this case, what advice does the company have? I personally have used it with very good results. But I feel that the texture of the liquid product is not easy to apply. Spreading will be more difficult than general gel or serum. If it can be customized it would be nice.