Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (Tinosorb M/MBBT) is a highly photostable broad-spectrum UV filter.
It combines absorption and particle-based scattering across UVA and UVB wavelengths. It is especially valuable for improving UVA coverage and overall filter-system stability.
Information approach
Consumer-friendly summaries are informed by established cosmetic ingredient references such as INCIDecoder and Paula’s Choice Ingredient Dictionary, while avoiding turning ingredient-level evidence into medical claims about the finished product.
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