What Matters Most
Vitamin C works when the formula is stable, the strength is appropriate for your skin, and the texture suits your routine. The goal is brighter, more even skin without irritation.
Key Factors to Compare
- Form; L ascorbic acid is strongest, derivatives are gentler
- Strength; 10 to 20 percent is common for L ascorbic acid
- Packaging; air and light exposure reduce effectiveness
- Texture; serums absorb quickly, creams suit dry skin
- pH; lower pH increases potency but can increase irritation
Common Mistakes
- Choosing high strength formulas without experience
- Using unstable packaging that oxidises quickly
- Layering vitamin C with too many other strong actives
- Expecting overnight results
What to Expect
A good vitamin C product brightens gradually over several weeks and helps support a more even tone with consistent use.