Using Vitamin C (L-Ascorbic Acid) in Glycerin Soap: Stability and Effectiveness Issues

Hello,

Regarding the use of Vitamin C in glycerin soap, here is some additional information:

Short Answer: Using Vitamin C (especially L-Ascorbic Acid) in glycerin soap for skin brightening is not recommended. This is because soap has a high alkaline pH, which causes Vitamin C to degrade very easily and quickly, preventing it from effectively benefiting the skin.

Further Explanation:

1. Instability in Alkaline Conditions: Glycerin soap has a relatively high pH, which is a highly unsuitable environment for L-Ascorbic Acid form of Vitamin C. Vitamin C is rapidly destroyed and loses its quality when exposed to alkaline conditions, leaving no active ingredient to help with skin brightening.
2. Wash-off Product: Soap is a cleansing product that is rinsed off immediately. This means that active ingredients have very little contact time with the skin, which is insufficient for them to penetrate the skin and show their nourishing effects.

For these two reasons, adding Vitamin C to glycerin soap is a waste of ingredients without achieving the expected benefits.

If you want the soap to have characteristics associated with Vitamin C, it is common to use related colors and fragrances, such as orange color and scent, to create a feeling. However, this does not mean that the soap contains active Vitamin C.

If you wish to use Vitamin C for skin brightening, it is recommended to choose other types of products designed for Vitamin C stability and sufficient skin contact time, such as serums, creams, or lotions.

Hope this information is helpful.