Four Jobs, One Tube: The Uncomfortable Arithmetic of the 'Active' Tinted Moisturiser
The shelf is now full of tinted bases promising serum-grade niacinamide, broad-spectrum SPF 50 and buildable coverage in a single pump. The marketing is fluent; the arithmetic is less so. A close look at how pigment load, filter percentage and application volume collide — and how to build a routine that does not depend on one product doing everything.
