Zinc Oxide
Zinc oxide is a mineral sunscreen filter — it sits on top of the skin and physically reflects UV rather than absorbing it chemically. Since every pigmentation and anti-aging active in this list is undone by unprotected sun exposure, this is arguably the single highest-leverage ingredient on the page.
How it works
A mineral UV filter that physically reflects and scatters both UVA and UVB radiation while remaining chemically inert on the skin surface, and separately exhibits anti-inflammatory, soothing properties.
In practice, skipping it on a day when a retinoid or acid was used the night before undoes a meaningful part of what that active was doing.
How to introduce it
No wait needed — apply the next step right away. Judging Zinc Oxide before week 1 means judging it before it's had time to actually work — most of what reads as "this isn't doing anything" in the first couple of weeks is just too early to tell.
- Every morning, no exceptions — this is what makes every other active safe to use.
- Reapply after 2+ hours of direct sun exposure.
Who should be careful
Zinc Oxide's safety rating is the lowest tier tracked here — well tolerated by most skin types, including sensitive skin, without a slow introduction.
Common in these product forms
Among the products Skinzy tracks in India that contain Zinc Oxide, it most often shows up as a sunscreen or a moisturizer.
Questions people ask
A mineral UV filter that reflects rather than absorbs sunlight — the one ingredient every other active on this page depends on.
Most people see a fair result around 1 weeks of consistent use — judging earlier usually means judging too soon.
In the morning. Zinc Oxide is intended for AM use.
Research
Selected studies and reviews on Zinc Oxide. Each link opens the abstract on PubMed. This is background reading, not a substitute for advice from a dermatologist.
- A review of inorganic UV filters zinc oxide and titanium dioxide.Schneider SL, Lim HW Photodermatol Photoimmunol Photomed, 2019 · PMID 30444533