dermatologist qa

Dermatologist Q&A: Your 10 Most Googled Skincare Questions, Answered

By Nascent Derm Pvt Ltd Mar 10, 2026 3 min read

We gathered the most-searched skincare questions from Indian users and put them to a dermatologist. Here are the honest, science-backed answers.


Q: Can I use Vitamin C and Niacinamide together?

Yes. The old myth that they react to form Niacin (a flushing agent) was based on in vitro studies at temperatures and concentrations far beyond what's used in skincare. Modern formulations of both are stable and complementary — Vitamin C brightens, Niacinamide stabilises and reduces redness.


Q: At what age should I start using Retinol?

As early as 25, especially with sun exposure history. You won't see dramatic anti-ageing effects immediately — that's not the point at 25. The point is stimulating baseline collagen production before the decline accelerates. Start low, go slow.


Q: Why is my skin getting worse after starting a new routine?

Likely "purging" — not a bad reaction. When you introduce exfoliants or Retinol, cell turnover accelerates, pushing existing congestion to the surface faster. Purging happens in areas you normally break out. If breakouts appear in new locations, that's a reaction — stop the product.


Q: Do I really need a separate eye cream?

The skin around your eyes is 0.5mm thick vs 2mm elsewhere — more delicate, less oil glands, and shows dehydration first. Dedicated eye creams are formulated at lower actives concentrations and without fragrances. Not strictly necessary, but the gentleness matters.


Q: Why does my moisturiser pill?

Usually happens when you layer multiple silicone-based products. Solution: apply water-based serums first, let them absorb for 60 seconds, then moisturise. If it persists, check if your cleanser left a film (common with micellar water as the only cleanse step).


Q: SPF every day, even indoors?

If you sit within 1 metre of a window, yes. UVA (the ageing radiation) passes through glass completely. UVA penetration doesn't require direct sunlight — diffuse skylight on a cloudy day in Mumbai is still meaningful UV exposure.


Q: Can I use Salicylic Acid and Retinol together?

Not in the same routine. Both exfoliate via different mechanisms, and combining them risks over-exfoliation and barrier disruption. Use Salicylic Acid in the morning routine and Retinol at night. Or alternate nights.


Q: How long does SPF last?

Chemical SPF degrades under UV exposure — reapply every 2 hours outdoors. Physical SPF (Zinc Oxide / Titanium Dioxide) is more stable but can be rubbed off. Sitting indoors? Morning application is sufficient.


Q: I have dark skin — do I still need SPF?

Absolutely. Melanin provides roughly SPF 13 natural protection. That is not enough to prevent PIH, sun-induced pigmentation, or long-term UV damage. Indian skin is disproportionately affected by post-UV hyperpigmentation compared to lighter skin tones.


Q: What's the single most impactful thing I can do for my skin?

SPF. Every dermatologist, every study, every decade of evidence points to the same answer. It prevents ageing, prevents pigmentation, reduces skin cancer risk, and costs ₹200–500 for a month's supply. Nothing else comes close per rupee of impact.


All Trisatva formulations are dermatologist-tested and designed for Indian skin. Browse the Skin School for more science-backed guides.

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