Sérum intense anti rides

Both use 3-o-ethyl ascorbic acid as a vitamin C form, but Tula's serum is a lightweight brightening/ferment cocktail with no ceramides, cholesterol, squalane or plant butters that give Cosmia its anti-wrinkle barrier-repair function.

Shares only the minor vitamin C derivative; the peptide (hexapeptide-11) and oil-based actives are totally different from Cosmia's ceramide/cholesterol/lipid anti-wrinkle system.

Revitalift Filler leans on hyaluronic acid and a peptide (dipeptide diaminobutyroyl benzylamide diacetate) rather than Cosmia's ceramide/cholesterol lipid blend and vitamin C derivative, so the anti-wrinkle mechanism differs despite similar marketing claims.

A Q10/niacinamide day cream with UV filters and silicones; it lacks the ceramide-cholesterol-squalane barrier complex and the vitamin C derivative that define Cosmia's formula.

This is a niacinamide/sunscreen brightening cream, not an anti-wrinkle lipid serum; it shares only a trace vitamin C derivative (sodium ascorbyl phosphate, not even the same one) and no ceramides or barrier lipids.