Sunscreen is the one product that does more for your skin's future than any serum. The question is which kind. Here is the difference between mineral and chemical filters and how to use sunscreen so it actually works.
Mineral vs chemical: how they work
Mineral (physical) filters – zinc oxide and titanium dioxide – sit on the skin and reflect and scatter UV rays. They work immediately after application and are very stable. Chemical filters absorb UV radiation and convert it into heat; they need 15–20 minutes to become effective and some can irritate reactive skin or sting the eyes.
Why mineral sunscreen suits sensitive skin
Zinc oxide is anti-inflammatory and non-sensitising – it is the same ingredient used in nappy creams. Mineral sunscreens are the usual recommendation for rosacea-prone, eczema-prone, post-procedure skin, and children over three.
The white cast problem – solved
The classic complaint about mineral sunscreen is the white film. Two answers: a tinted formula, where mineral pigments neutralise the white – like our Tinted Mineral Sunscreen SPF 30, which doubles as a light BB cream – or a colourless stick that you tap in thoroughly, like the SPF 50 Mineral Stick.
SPF 30 or SPF 50?
SPF 30 blocks about 97% of UVB, SPF 50 about 98%. For city days, SPF 30 applied properly beats SPF 50 applied thinly. For beach, mountains and sport, use SPF 50 and reapply more often.
How much and how often
- Face and neck: about half a teaspoon (two finger-lengths). Most people apply a quarter of that.
- Apply as the last step of your morning routine, before makeup.
- Reapply every two hours outdoors and after swimming, sweating or towelling. A stick makes reapplication over makeup easy – the Tinted SPF 50 Stick is designed for exactly that.
Sunscreen and active ingredients
If you use glycolic acid, AHA peels, vitamin C, kojic acid or retinol, daily sunscreen is not optional – without it those ingredients can make pigmentation worse.
FAQ
Can I skip sunscreen on cloudy days?
No. Up to 80% of UVA passes through clouds, and UVA is what causes wrinkles and pigmentation.
Is mineral sunscreen safe for children?
Mineral filters are the standard recommendation for children over three. Under three, seek shade and clothing first.
Does tinted sunscreen replace foundation?
For sheer coverage, yes. The tint evens out redness without a makeup feel.
