Facial Scrub Cream Formulation: Mung Bean Powder Sterilization and Measurement

Question

I am working on a second formula for a facial scrub cream using mung bean powder. I would like to know if the ingredients in my formula are compatible. Additionally, I used mung bean powder prepared by simple blending; is this suitable, or does it need special processing? I also need clarification on how to measure the ingredients according to the percentages in the formula – should I measure by weight (% w/w) or by volume?

MySkinRecipes Expert · Accepted Answer

Based on the information from the staff, the ingredients in your second formula can generally be combined, except for the mung bean powder prepared by simple blending.

The staff explained that mung bean powder prepared this way has a high microbial load and will cause the product to spoil quickly, even with a preservative.

To make your facial scrub cream successfully and safely, you should consider the two options suggested by the staff:

Sterilize the mung bean powder: This requires processing the powder at very high temperatures (above 100°C, like UHT processing at 140-150°C for a short time) to kill all microorganisms.
Use a commercially sterilized scrub powder: You can find suitable scrub powders that have already been sterilized in the shop's "Scrub/Exfoliant" category.

Regarding measurement, as previously mentioned by the staff, cosmetic formulations use weight-by-weight (% w/w), meaning you need to weigh each ingredient to achieve the correct percentage, not measure by volume.