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Titanium Dioxide (Cosmetic/Sunscreen) is permitted by the US FDA. Several countries restrict, warning-label, or have reviewed it for safety concerns. The US has more lenient additive rules than the EU, UK, Canada, and Japan, which is why this ingredient remains widely used here.
Topical cosmetic-grade titanium dioxide (including nano-TiO2 in non-spray formulations) has been reviewed by the EU SCCS and confirmed safe. Nano-TiO2 does not penetrate intact skin. The EU restricts TiO2 in spray applications (inhalation risk for nano-TiO2 — classified as possibly carcinogenic by inhalation). In traditional non-nano form, no skin penetration or systemic concerns exist. The EU ban of TiO2 (E171) in food does not apply to topical cosmetic use.
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