Why Your Vitamin C Serum Isn’t Working (And How to Choose the Right One)
If you’re using a Vitamin C serum but still struggling with dull skin, dark spots, or uneven tone, you’re not alone. One of the biggest reasons a vitamin C serum isn’t working is instability. Many formulas use L-Ascorbic Acid, which oxidizes quickly when exposed to air, light, or heat—making it less effective before it even […]