06/24/2025
Why your Vitamin C serum turns yellow over time? π
π‘ Ascorbic acid is most stable in its dry form. Once mixed with water, it begins to degrade β first into dehydroascorbic acid (DHAA), and then into diketogulonic acid, which is irreversible and less effective.
π That yellow color? Itβs a visual cue that your vitamin C has started to oxidize.
βοΈ Pro tip: Opt for a stabilized formulas in airtight packaging or order a freshly prepared one for maximum potency!