La Roche-Posay Hyalu B5 Serum

Updated Nov 8, 2026 · Top Hyaluronic acid serums

Best for Dry or sensitive skin that wants a richer hyaluronic serum and does not mind a scent.

La Roche-Posay's hyaluronic serum, with vitamin B5 and madecassoside. Dermatologist Rachel Nazarian, quoted by Glamour, likes it because the hyaluronic acid draws water in and the B5 slows that water from evaporating. The texture is richer than The Ordinary. Glamour's tester flagged a strong scent, which is the reason to skip it if fragrance makes you red. The brand's own tests talk about barrier repair in an hour. Those numbers are the brand's. Seal it with a cream if you are very dry.

Size

1.01 fl oz

Texture

Richer serum

Key ingredients

Hyaluronic acid, vitamin B5, madecassoside

Scent

Some users notice one

Use

Dry and sensitive skin

Sources: Glamour 2025: Dr. Nazarian on Hyalu B5, and a scent complaint (published 2025) · La Roche-Posay Hyalu B5 listing: hyaluronic acid, B5, madecassoside