Vitamin C Q&A and Myth-Busting
Plain-English answers to common vitamin C questions and myth-busting reads. Not medical advice; see our editorial policy.
Common Questions
How to layer Vitamin C with sunscreen?
Apply Vitamin C serum on clean, dry skin, wait 1–2 minutes to absorb, then moisturiser, then sunscreen last. Vitamin C boosts SPF's photoprotective effect but doesn't replace it.
Can I use Vitamin C and Niacinamide together?
Yes — modern stable derivatives of both work fine together. If you use pure low-pH L-Ascorbic Acid and experience flushing, try using them at different times of day instead.
How long until I see results?
Most users see a visible brightening effect in 4–6 weeks of consistent daily use; pigmentation fading can take 8–12 weeks.
Can I use Vitamin C with Retinol?
Generally best used at different times — Vitamin C in the morning, Retinol at night — to minimise irritation and preserve efficacy of both actives.
Myth-Busting & Expert Articles
Does Vitamin C Cause Purging? Separating Fact from Myth
Unlike retinoids and AHAs/BHAs, Vitamin C is not a cell-turnover accelerant — so what you're seeing probably isn't purging.
By BestCSerum Editorial
Myth-bustingVitamin C: Morning or Night? Here's What the Science Says
Most dermatologists recommend Vitamin C in the AM for its antioxidant synergy with sunscreen — but night use has its case too.
By BestCSerum Editorial