Question 1

Can I mix Niacinamide and Vitamin C?

Accepted Answer

Yes, you can mix Niacinamide and Vitamin C — the old belief that they form a yellow compound (niacin) is largely a myth at the concentrations found in skincare. However, both are active ingredients and using very high concentrations of each together may reduce their individual efficacy. Using them at different times (AM/PM) is a safe approach.

Question 2

Can I use Retinol and AHA together?

Accepted Answer

It's generally advised to avoid using Retinol and AHA (like Glycolic or Lactic Acid) in the same routine. Both are exfoliants and using them together can cause severe irritation, redness, and compromise your skin barrier. Use AHA in the morning and Retinol at night, or alternate nights.

Question 3

Can I use Benzoyl Peroxide with Retinol?

Accepted Answer

Avoid using Benzoyl Peroxide and Retinol together. Benzoyl Peroxide can oxidise and deactivate Retinol, making it ineffective. Use Benzoyl Peroxide in your morning routine and Retinol at night.

Question 4

Is Hyaluronic Acid safe to use with everything?

Accepted Answer

Yes — Hyaluronic Acid is one of the most compatible skincare ingredients. It's a humectant that attracts moisture and is safe to layer with virtually all actives including Retinol, Vitamin C, AHA, BHA, and Niacinamide. It can actually help buffer irritation from strong actives.

Question 5

Can I use Vitamin C and SPF together?

Accepted Answer

Yes — Vitamin C and SPF are an excellent combination for daytime use. Vitamin C is an antioxidant that helps neutralise free radicals not blocked by SPF, and SPF protects Vitamin C from UV degradation. Apply Vitamin C serum first, let it absorb, then apply SPF on top.

Question 6

What skincare ingredients should never be mixed?

Accepted Answer

The main combinations to avoid: Retinol + AHA/BHA (over-exfoliation), Benzoyl Peroxide + Retinol (deactivation), Benzoyl Peroxide + Vitamin C (oxidisation), multiple strong exfoliants together (AHA + BHA + physical scrub), and high-concentration Vitamin C + Niacinamide (possible reduced efficacy).

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