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Sunscreen, also known as sunblock, [a] sun lotion or sun cream, is a photoprotective topical product for the skin that helps protect against sunburn and prevent skin cancer. Sunscreens come as lotions , sprays, gels, foams (such as an expanded foam lotion or whipped lotion [ 4 ] ), sticks, powders and other topical products.
Mineral ingredients, which include zinc oxide and titanium dioxide, are also referred to as physical sunscreens; these “block harmful ultraviolet damage by sitting on the skin,” says Dr. Mona ...
Titanium dioxide has been found to be toxic to plants and small organisms such as worms, nematodes, and small arthropods. [22] The toxicity of TiO 2 nanoparticles on nematodes increases with smaller nanoparticle diameter specifically 7 nm nanoparticles relative to 45 nm nanoparticles, but growth and reproduction are still affected regardless of ...
[3] [4] These standards are complemented by existing sunscreen regulatory bodies such as the FDA that regulate the efficacy of the sunscreen, safety and permitted ingredients. Generally speaking, sunscreen has photo-protective properties that reduce the risk of skin cancer and ageing with relation to the SPF value and proper application. [5] [6]
According to some studies, "the most effective sunscreens contain avobenzone and titanium dioxide." [ 30 ] [ 31 ] Avobenzone can degrade faster in light in combination with mineral UV absorbers like zinc oxide and titanium dioxide, though with the right coating of the mineral particles this reaction can be reduced. [ 32 ]
The original product dates to 1944, when pharmacist Benjamin Green invented a lotion to darken tans. [3] The product line has been expanded to include many skin care products, predominantly sunscreens. Coppertone has become the leading sun care brand in the United States, with annual $9 billion in global sales. [3]
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