Nonchemical sunscreen: how to choose and use it

What does nonchemical sunscreen actually mean?

Mineral sunscreen is also called physical sunscreen. Chemical sunscreen uses other UV filters, such as avobenzone or octinoxate. A hybrid combines mineral and chemical filters. If you want mineral filters only, read the Active Ingredients section rather than choosing by the product name: zinc oxide and titanium dioxide should be the only sunscreen actives listed. That describes the UV filters, not every ingredient in the formula.1

Mineral sunscreen works mainly by absorbing UV radiation, not by sitting on your skin as a mirror. It also reflects and scatters some light. Chemical sunscreens absorb UV radiation too. Both types can protect skin effectively; the practical differences are the filters, the finish and how comfortable the formula feels.134

Mineral, chemical or hybrid sunscreen?

Choose mineral sunscreen if other sunscreen filters irritate your skin or you specifically want mineral actives. Otherwise, choose a qualifying formula you will use consistently. Less expensive sunscreens with the same ingredients work as well as expensive ones, so the brand name is not an extra layer of protection.15

What should you look for on the label?

SPF, or sun protection factor, describes protection mainly against UVB, the rays responsible for sunburn. Broad spectrum protection also covers UVA, which contributes to premature skin ageing. Mineral ingredients alone are not a substitute for checking the finished product's protection rating. In the UK, look for SPF 30 or higher and at least four stars for UVA protection. A UVA symbol inside a circle indicates that the product meets the EU standard.136

SPF 50 is a useful choice for days spent outdoors for longer. Higher SPF does not remove the need to reapply. Check the expiry information before using an old bottle. An open jar symbol with a number and an M tells you how many months the product lasts after opening.146

Which mineral sunscreen suits your skin?

• For sensitive skin, look for a sensitive skin label and avoid fragrance, parabens and oxybenzone.
• For rosacea, or if sunscreen stings or burns, try a fragrance free formula whose only sunscreen actives are zinc oxide and titanium dioxide.
• For oily or acne prone skin, look for noncomedogenic or won't clog pores on the label.
• For dry skin, look for moisturizing or dry skin on the label.
• For use around the eyes, a sunscreen stick helps prevent sunscreen dripping into them.

Lotions and creams typically provide more reliable coverage than sprays, because it is harder to judge whether you have sprayed enough. If you choose a spray, apply it generously and rub it in for even coverage. Do not inhale spray sunscreen or spray it directly around your face or mouth. Avoid using sprays near heat or an open flame.14

Will mineral sunscreen leave a white cast?

Mineral sunscreen can leave a white or grey cast, so an invisible finish is not automatically included with the mineral branding. A tinted formula that matches your skin tone can help avoid that residue. Tinted sunscreens containing iron oxides also protect against visible light, which can worsen dark spots, particularly on darker skin tones. The tint does not replace the need for SPF 30 or higher, broad spectrum protection and water resistance.124

Smaller mineral particles improve application and reduce white residue. Concerns have been raised about possible harmful effects of nanoparticles, but adverse effects have not been demonstrated. The established benefits of sun protection outweigh those theoretical risks.3

How do you apply mineral sunscreen?

1. 1Apply sunscreen every day you will be outdoors, including cloudy days and winter. Use it on skin not covered by clothing.
2. 2Apply to dry skin before going outside. Allow 15 to 30 minutes and follow the bottle's directions. For prolonged exposure with a risk of burning, apply 30 minutes before leaving and again just before going out.
3. 3Use enough to cover exposed skin generously. Most adults need about one ounce for exposed body areas, depending on body size. For the face, use at least one teaspoon.
4. 4Cover commonly missed areas, including your ears, neck, hairline, hands and tops of your feet. Protect your lips with an SPF 30 or higher lip product.
5. 5Reapply approximately every two hours outdoors, and after swimming, sweating, towel drying or rubbing sunscreen off. Follow the manufacturer's directions.

Water resistant does not mean waterproof or sweatproof. Applying too little reduces protection, and a morning application does not cover an entire day outdoors. Regular sunscreen use helps prevent sunburn and reduces the risk of premature skin ageing and skin cancer; sunscreen is protection, not a reason to extend sun exposure.156

Can you use mineral sunscreen during pregnancy?

Mineral sunscreen is commonly recommended during pregnancy because zinc oxide and titanium dioxide are absorbed very little through the skin and have a long history of use in pregnancy. Chemical sunscreens can also be appropriate. Daily sun protection matters because hormonal changes can increase susceptibility to melasma, patches of darker skin that sun exposure can worsen.4

Is mineral sunscreen suitable for children?

For children aged six months or older, choose sunscreen made for children; many contain zinc oxide and titanium dioxide. For babies younger than six months, prioritise shade and protective clothing and keep them out of direct sunlight. Talk to a pediatrician before using sunscreen on a baby under six months.256

Does choosing mineral mean other sunscreens are unsafe?

No. The FDA's proposed US sunscreen rules identify zinc oxide and titanium dioxide as generally recognised as safe and effective. Several other filters need additional safety data, which leaves their assessment unsettled rather than making mineral the only appropriate choice. In September 2026, the FDA issued a final order removing PABA and trolamine salicylate from the sunscreen monograph because their risks outweigh their benefits. The FDA is not aware of sunscreen products currently sold in the US containing either ingredient, and consumers do not need to take action because of that announcement.7

What else protects you from the sun?

Combine sunscreen with shade, clothing, a wide brimmed hat and sunglasses that block UVA and UVB. A baseball cap leaves your ears and the sides of your face exposed. Water, sand and snow reflect sunlight, so take extra care around them. In the UK, seek shade particularly between 11am and 3pm from March to October.56

If you get sunburned, stay out of the sun until redness has gone. Seek medical help if you feel unwell or your skin swells badly or blisters. Report a new mole, growth or lump, or a patch that changes in size, shape or colour, to your doctor promptly.6