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It can be used in concentrations of up to 10% in the EU and up to 6% in the US. On the up side, sunscreens are pretty well regulated in several parts of the world, and BP-3 is considered ' safe as used' and is an allowed sunscreen agent everywhere.

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If that was not enough, Wikipedia claims that BP-3 is nowadays the most common allergen found in sunscreens, and the always-trustworthy smartskincare writes that ' have been shown in some studies to promote the generation of potentially harmful free radicals'. In fact, a 2004 follow-up study to examine the estrogenic effect of sunscreens when used topically on the whole body found that 'the endogenous levels of reproductive hormones were unaffected' (even though BP-3 could be detected both in plasma and urine, so its absorption is no doubt too good). Estrogenic activity was confirmed only in-vitro (in test tubes) and when taken orally by lab animals, and not when used topically as you would normally.

Potassium Palmitoyl Hydrolyzed Oat ProteinĪnother concern of BP-3 is that it shows some estrogenic activity, though it's probably not relevant when applied topically to the skin.

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Unlike chemical sunscreens, which work by absorbing UV rays, physical sunscreens physically block the sun’s rays to shield your skin from UV damage.Acrylates/C10-30 Alkyl Acrylate Crosspolymer Go for mineral sunscreens: Instead of harsh chemicals, reef-safe sunscreens typically only contain mineral or physical blockers like zinc oxide or titanium dioxide, says Joshua Zeichner, MD, director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York.

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How to choose the best reef-safe sunscreen “‘Reef-safe’ sunscreens are typically products that do not contain active ingredients that are known or suspected of harming coral reefs,” says Leiba. The good news is, there are plenty of sunscreens out there that will both protect your skin and the oceans called reef-safe (or mineral) sunscreens. This will make a huge difference in protecting our coral reefs, marine life, and human health,” Senator Mike Gabbard, who introduced the bill, told the Honolulu Star-Advertiser last summer.

“When you think about it, our island paradise, surrounded by coral reefs, is the perfect place to set the gold standard for the world to follow. That’s why Hawaii governor David Ige signed a bill into law last July that banned the sale of sunscreens containing oxybenzone or octinoxate, making Hawaii the first state to take such action. In fact, even a tiny amount of oxybenzone can harm or kill corals by damaging the DNA of mature and larval coral, according to a study published in the Archives of Environmental Contamination and Toxicology. “Oxybenzone can cause coral bleaching that would then likely reduce the ability of coral to recover,” says Leiba. Oxybenzone, in particular, has been proven to have some pretty detrimental effects on the reefs. “Research shows that some of the sunscreen chemicals people should avoid to protect their health, like oxybenzone and octinoxate, may also endanger the health of coral reefs,” says Leiba. Geological Survey has called America’s coral reefs ‘imperiled national treasures,’ stating that the reefs are dying at alarming rates,” says Nneka Leiba, MPH, director of the Environmental Working Group’s healthy living science program. The major downside? The sunscreen you’re using to protect your body might actually be harming our oceans. You already know sunscreen is important: Slathering yourself in SPF is one of the best things you can do to protect yourself from skin cancer, the most common cancer in the United States.

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