From the FDA Drug Label
■ helps prevent sunburn ■ If used as directed with other sun protection measures ( see Directions), decreases the risk of skin cancer and early skin aging caused by the sun The FDA drug label does not answer the question.
From the Research
Mineral sunscreen is better because it provides immediate protection upon application, is generally gentler on sensitive skin, and offers a safer alternative to chemical sunscreens. Mineral sunscreens, which contain active ingredients like zinc oxide and titanium dioxide, work by absorbing UV rays, as evidenced by a study published in 2016 1, which found that the primary action of UV protection by these sunscreen agents is through absorption and not by reflection or scattering. Unlike chemical sunscreens that need about 20-30 minutes to absorb into the skin before becoming effective, mineral formulations create an instant barrier, making them ideal for daily use. They're less likely to cause irritation or allergic reactions, as noted in a 2019 review 2, which highlighted the low human health risks associated with inorganic filters like zinc oxide and titanium dioxide. Mineral sunscreens are also considered reef-safe since they don't contain oxybenzone and octinoxate, chemicals known to damage coral reefs, as discussed in a 2020 article 3. Some key points to consider when using mineral sunscreen include:
- Apply generously (about a nickel-sized amount for the face)
- Reapply every two hours or after swimming or sweating
- Newer formulations have improved issues with white cast on darker skin tones and thickness, as mentioned in a 2021 review 4
- Zinc oxide has a broad UVA-UVB absorption curve, while titanium dioxide provides better UVB protection, as noted in a 2010 study 5. Overall, mineral sunscreens offer a safe and effective way to protect the skin from UV damage, and their use is recommended as part of a comprehensive sun protection strategy.