From Tinosorb S to Parsol Shield: One Filter, Many Names
Decoding the branding behind bemotrizinol.
Bemotrizinol (Parsol Shield) is approved in formulas up to 6% for adults and children 6 months and older.
Bemotrizinol is broad-spectrum and so photostable it retains roughly 98% of activity after intense UV exposure.
Questions we get a lot
Are next-gen UV filters better than older ones?
Newer filters such as bemotrizinol, bisoctrizole and Mexoryl 400 generally give broader, more even UVA coverage and far better photostability than older ones like avobenzone, which degrades in sunlight. They also tend to feel more elegant — though applying enough and reapplying still matter most.
Which sunscreen filters are approved in the US vs the EU?
The EU has approved 34 UV filters for sunscreens; the US allows about 16 (now 17 with bemotrizinol's 2026 approval). Filters widely used in Europe and Asia — such as bisoctrizole, drometrizole trisiloxane and Mexoryl 400 — remain under FDA review, which is why US options have lagged.
What does broad-spectrum protection actually mean?
'Broad-spectrum' means a sunscreen protects against both UVA and UVB. In the US a product must pass an FDA critical-wavelength test to make the claim. Because SPF only measures UVB protection, broad-spectrum labeling is how you know you're also covered against deeper, aging UVA rays.
r/AsianBeauty: 'Can someone explain what Tinosorb S and M actually do?'