Mixing Vitamin C Powder into Serum

Based on the information from the product descriptions, adding Vitamin C (L-ascorbic acid) (Ultra-Fine) powder directly into the Stabilized Vitamin C (Natural-C Glycol™) Serum is not recommended.

Here's why:

• Stability: L-ascorbic acid powder is highly unstable, especially when dissolved in water or water-based formulas. The Stabilized Vitamin C (Natural-C Glycol™) Serum is a finished product specifically formulated for stability. Adding unstable L-ascorbic acid powder will likely disrupt the stability of the serum, causing both the added powder and the original serum's Vitamin C to degrade quickly (oxidize), reducing effectiveness and potentially changing the color.
• Formulation Integrity: The description for Stabilized Vitamin C (Natural-C Glycol™) Serum explicitly states that it is "Not suitable for mixing any additional ingredients. This is because it may affect the stability of vitamin C." It is designed to be used as a finished product.
• pH Balance: L-ascorbic acid requires a specific low pH range for optimal skin penetration and stability. Adding powder to a pre-formulated serum will alter its pH, which could negatively impact both the stability and efficacy of the Vitamin C, and potentially cause skin irritation if the pH becomes too low.

To increase your Vitamin C concentration safely and effectively, consider using a product that is already formulated at a higher percentage or using a Vitamin C powder product specifically designed to be mixed into a base right before application.