Storage and Stability of Dry Powder Cosmetic Ingredients

Regarding your question about mixing Vitamin B3 (Niacinamide), Glucosamine (N-acetyl-D), Tranexamic Acid, Natural Betaine, Alpha Arbutin, and Vitamin C (L-ascorbic acid) in dry powder form:

• Storage Duration: When these ingredients are mixed together as dry powders and stored properly away from moisture, their shelf life is generally the same as storing each powder separately. The key is to prevent exposure to humidity, light, and heat, which can degrade the ingredients over time. Store the mixture in a cool, dark, and dry place in a tightly sealed container.

• Reactions: These ingredients can be safely mixed together in their dry powder form. Significant chemical reactions typically require a solvent, such as water. As long as the mixture remains completely dry, the ingredients will not react with each other.

• Preservatives: Preservatives are not necessary for a dry powder mixture. Microorganisms like bacteria and fungi require water to grow. A preservative is only needed when you add water or other aqueous ingredients to create a liquid or semi-liquid formulation.