I found several search results related to sun cream products, their ingredients, and their effects on human health. Here are the key points from each source:
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According to a review article, some chemical components in sun cream filters can be harmful to human health. For example, 4-MBC (4-Methylbenzylidene Camphor) is an endocrine-disrupting chemical that is persistent and bioaccumulative. It is not authorized in the US for sun creams and can have possible thyroid toxicity. On the other hand, Tinosorb S (Bis-Ethylhexyloxyphenol methoxyphenyl triazine) is photostable and non-estrogenic, but there are few studies on its toxicity. Iscotrizinol (Uvasorb HEB, diethylhexyl butamido triazone) has no data available, but it is considered acceptable with caution.
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Another review article discusses the neurotoxicity of several organic filters commonly found in sunscreens, including octyl methoxycinnamate, benzophenone-3 and −4, 4-methylbenzylidene camphor, and 3-benzylidene camphor. The article suggests that these chemicals can have harmful effects on the nervous system.
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A study suggests that natural components in sunscreens, such as green coffee oil and spent coffee grounds oil, could be potential replacements for synthetic chemicals in sunscreens.
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Health Canada has a draft guidance document for sunscreen monographs that lists the approved medical ingredients for sunscreens. These include titanium dioxide, zinc oxide, para-aminobenzoic acid, avobenzone, and others.
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A review article explains that sunscreens contain chemical (organic) or physical (inorganic) compounds that act to block ultraviolet radiation. The article lists the medical ingredients approved by Health Canada, including titanium dioxide, zinc oxide, para-aminobenzoic acid, avobenzone, and others.
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A report from the California Department of Public Health lists titanium dioxide as the most frequently reported ingredient in pigmented products. However, the report does not provide information on the safety of these ingredients in sunscreens.
Overall, the search results suggest that some chemical components in sun cream filters can be harmful to human health, while others are considered acceptable with caution. Natural components in sunscreens are being explored as potential replacements for synthetic chemicals. Health Canada has a draft guidance document that lists the approved medical ingredients for sunscreens, including titanium dioxide, zinc oxide, para-aminobenzoic acid, and avobenzone. However, the safety of these ingredients in sunscreens is still a matter of debate.
