#L-ascorbic acid

All articles tagged "L-ascorbic acid".

2 articles

October 26, 2025·3 min read

How to Choose the Best Vitamin C Serum

Look for: L-ascorbic acid at 10-20% (the most studied form), pH below 3.5 (ensures penetration), vitamins E and ferulic acid (stabilize and enhance efficac...

How to Tell If Your Vitamin C Serum Has Oxidized

Skincare

March 19, 2025·5 min read

How to Tell If Your Vitamin C Serum Has Oxidized

Vitamin C serums degrade quickly. Learn how to spot oxidation, what causes it, and how to store your serum to maximize its potency and shelf life.