Mixing Vitamin C (L-Ascorbic Acid) with Hyaluronic Acid Gel Base and Body Lotion

Yes, you can mix Vitamin C (L-ascorbic acid) powder with a Hyaluronic Acid gel base. Both are water-soluble, allowing them to combine. However, for L-ascorbic acid to be stable and effective, the final mixture needs to have a low pH, ideally between 3.5 and 4.0 (as recommended for skin application by the FDA). You may also need to add a chelating agent like Disodium EDTA to help improve stability in the water-based gel.

Regarding adding this mixture to a standard body lotion, it is generally not recommended. Body lotions are typically formulated with a pH suitable for skin (around 5.5-6.5). Adding a low-pH Vitamin C mixture (pH 3.5-4.0) will significantly lower the pH of the lotion. This can cause several issues:

• Formula Instability: The change in pH can break the emulsion of the lotion, causing it to separate.
• Skin Irritation: A lotion with a pH that is too low can be irritating to the skin.

If you wish to use L-ascorbic acid on your body, it is better to create a formulation specifically designed to incorporate L-ascorbic acid at the correct pH and with appropriate stabilizers, rather than adding it to a pre-made lotion.