How to Read a Sunscreen Label Like a Chemist
Decoding the active ingredients panel.
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
What is bemotrizinol (Parsol Shield)?
Bemotrizinol (trade name Parsol Shield; also known as Tinosorb S) is a broad-spectrum UVA+UVB filter that is highly photostable. On June 9, 2026 the FDA approved it — the first new sunscreen active added to the US monograph since the 1990s — for adults and children 6 months and older at up to 6%.
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.
r/AsianBeauty: 'Can someone explain what Tinosorb S and M actually do?'
