This is a small category with one heavyweight: mineral sunscreen filters (zinc oxide, titanium dioxide) are the backbone of the single most important skincare step there is. Alongside them, topical and dietary zinc supports oil control and healing, and magnesium plays a supporting soothing role.
Do not let the short list fool you — this category punches above its weight because it contains sun protection. Mineral (physical) UV filters sit on the skin and reflect or absorb ultraviolet light; they are broad-spectrum, photostable and gentle, which makes them a common choice for sensitive and reactive skin.
Zinc also has a role in calming inflammation and regulating oil, which is why it appears in acne and barrier products. Magnesium is more of a supporting soother. Minerals rarely headline a routine, but the one that does — sunscreen — matters more than any active in any other category.
Every mineral we cover, with what it does and the concerns it is most often used for. Each name links to its full glossary entry.
| Ingredient | What it is | Most used for |
|---|---|---|
| Zinc | Topical zinc PCA regulates sebum via 5-alpha reductase inhibition, kills C. | Acne, Oiliness, Redness |
| SPF / Sunscreen | The single most evidence-backed anti-aging intervention. | Aging, Pigmentation |
| Magnesium | Involved in 600+ enzymatic reactions including DNA repair, inflammation control, stress response and sleep. | Redness, Aging |
Across the catalogue, the minerals here are most often used for these concerns — each links to its evidence-led concern hub with a full routine:
Redness (2), Aging (2), Acne (1), Oiliness (1), Pigmentation (1).
These commonly pair well with: Niacinamide, Salicylic Acid, Vitamin C, Vitamin E, Ferulic Acid, Vitamin D. Pairing is about getting more from a routine without adding irritation — humectants, barrier lipids and niacinamide are frequent partners here.
Nothing in this category carries a hard "avoid combining" flag in our catalogue — these are generally cooperative actives. Always introduce one new product at a time regardless.
Neither is universally better — both can be broad-spectrum and effective. Mineral filters (zinc oxide, titanium dioxide) are gentle, photostable and suit sensitive skin, but can leave a white cast. Chemical filters are often more cosmetically elegant. The best sunscreen is the broad-spectrum one you will actually reapply.
There is reasonable evidence that zinc — both topical and oral — can help acne by reducing inflammation and regulating oil and bacteria. It is rarely a standalone cure, but it is a legitimate supporting ingredient, and topical zinc is well tolerated by most skin types including sensitive ones.
Zinc oxide is a mineral UV filter that provides broad-spectrum sun protection by sitting on the skin and blocking ultraviolet light. It is also mildly soothing and non-irritating, which is why it appears in sunscreens for sensitive and reactive skin, as well as in some barrier and diaper creams.
Often, yes. Mineral filters stay largely on the skin surface rather than being absorbed, and they are photostable and non-irritating, which makes them a common recommendation for reactive, rosacea-prone or post-procedure skin. The main trade-off is a potential white cast, especially on deeper skin tones.
Browse the rest of the ingredient library: Acids, Retinoids, Vitamins — or see the full ingredient categories index.
Written and reviewed by JoAnn, editor of Skin Stacker — see our methodology and editorial standards.
Reviewed / last updated: 2026-07-17. For informational purposes only — not a substitute for medical advice.