Sunscreen without harmful chemicals: what to choose

Are chemical sunscreens harmful?

Some sunscreen active ingredients pass through the skin and enter the body. The FDA has requested more safety information to assess whether that exposure carries risks. Absorption and harm are different questions: the practical advice remains to use sunscreen alongside shade and protective clothing, rather than leave skin unprotected while safety reviews continue.3

The FDA's 2021 proposal identified zinc oxide and titanium dioxide as generally recognized as safe and effective. It requested additional safety data for 12 other filters, including oxybenzone, avobenzone, octocrylene and homosalate. That request is different from its finding that the risks of PABA and trolamine salicylate outweigh their benefits. In September 2026, the FDA issued a final order removing those two ingredients from the US sunscreen monograph, the rules for sunscreens sold without individual drug approval. The order cannot take effect earlier than one year after issuance. The FDA is not aware of sunscreens currently sold in the US containing either ingredient, so consumers do not need to take action because of that announcement.4

The US ingredient list is also changing in the other direction: the FDA added bemotrizinol as a permitted sunscreen active ingredient in June 2026. Sunscreen regulation differs between countries, so read the actual label when buying abroad rather than assuming the ingredients or directions match a US product.3

Mineral, chemical or hybrid: which should you choose?

Mineral sunscreen is not simply a mirror sitting on your face. Both mineral and chemical filters protect primarily by absorbing UV radiation; mineral filters also reflect some radiation. 'Sunblock' is a misleading name because no sunscreen blocks all UV radiation, even if the name sounds like it has veto power.6

Mineral sunscreen can leave a white residue. Smaller mineral particles improve application and reduce that residue. Concerns about potential toxic or cancer causing effects of these nanoparticles have been raised, but adverse effects have not been demonstrated; the established benefits of sun protection outweigh those theoretical risks. A tinted formula is another option for reducing a white cast.26

What should you look for on the label?

• Read the Active Ingredients section to identify the UV filters. Inactive ingredients are the other parts of the formula, such as water or oil.
• Choose broad spectrum protection, which covers UVA and UVB. SPF mainly describes protection against UVB, the rays responsible for sunburn.
• Choose SPF 30 or higher. SPF 30 filters out about 97% of UVB rays; higher SPF does not eliminate the need to reapply.
• Look for a tested water resistance duration of 40 or 80 minutes. No sunscreen is waterproof.
• For UK shopping, look for SPF 30 or higher and at least 4 star UVA protection. UVA inside a circle indicates that the product meets the EU standard.

'Sport' has no FDA defined meaning, so the word is not doing the testing. Check the water resistance duration instead. 'Sensitive skin' also has no FDA defined meaning; those formulas often contain mineral filters and omit fragrance, but read the ingredients rather than treating the phrase as a complete formula description.2

How do you apply sunscreen properly?

1. 1Apply sunscreen every day you will be outside, including cloudy days. Put it on dry skin 15 minutes before going outdoors.
2. 2Use enough to cover all skin not covered by clothing. Most adults need about one ounce for exposed skin, and the AAD advises at least one teaspoon for the face.
3. 3Cover commonly missed areas, including ears, neck, hands, tops of feet, hairline and exposed scalp. Use SPF 30 or higher lip balm for your lips.
4. 4Reapply approximately every two hours outdoors and after swimming or sweating, following the bottle's directions. Reapply after towel drying.
5. 5Use shade, a hat, sunglasses and protective clothing too. Sunscreen alone cannot provide complete protection.

UK guidance advises two applications when you expect enough sun exposure to risk burning: one 30 minutes before going out and another just before leaving. It suggests around six to eight teaspoons for the entire adult body. Applying too thinly reduces protection, whichever type of filter you choose.7

Creams suit dry skin and facial application; gels suit oily skin and hairy areas. Sprays make it harder to judge coverage. Never spray sunscreen directly onto the face or inhale it, and keep sprays away from heat and flames. For body application, spray until skin glistens, then rub it in evenly.1

What if sunscreen irritates your skin?

A sunscreen ingredient or fragrance can cause a reaction when it interacts with sunlight. This is called photocontact dermatitis, an inflammatory skin reaction involving light and a substance on or in the skin. Photoallergic reactions can produce an itchy rash mainly on exposed areas. Stop using the suspected product and seek assessment if the reaction persists or returns. A dermatologist can use photopatch testing to identify a photoallergy, and mineral filters are an alternative for people with chemical sunscreen photoallergy.5

Medicines can also trigger reactions involving sunlight, including doxycycline, thiazides and amiodarone. A rash after sun exposure is therefore not automatically a sunscreen allergy. Seek medical help for badly swollen or blistered skin, or if you feel unwell after sunburn.57

For babies younger than six months, prioritize shade and protective clothing, and ask a doctor before using sunscreen. For children six months and older, zinc oxide or titanium dioxide are less likely to irritate sensitive skin. Continue using shade and clothing even when sunscreen is applied.23

Should you choose tinted sunscreen?

Tinted sunscreen containing iron oxide adds protection against visible light, which can worsen dark spots and contributes to melasma. This is especially useful for darker skin tones. Choose a tint that matches your skin while retaining broad spectrum SPF 30 or higher.2

Does 'reef safe' mean safer sunscreen?

'Reef safe' has no FDA defined meaning, so two words on a bottle do not amount to an environmental inspection. Evidence about sunscreen ingredients and reefs remains limited, and some studies used unrealistic conditions or concentrations. Certain destinations restrict particular filters, so check local rules before travelling rather than relying on that claim.26

Keep the sunscreen effective

Keep the container out of excessive heat and direct sunlight. Discard sunscreen past its expiration date. For a US sunscreen without an expiration date, discard it three years after purchase; if you do not know its age, replace it.3