La Roche-Posay Hyalu B5 Hyaluronic Acid Serum with Vitamin B5 — Plumping, Deep Hydration for Sensitive Skin

La Roche-Posay Hyalu B5 is a concentrated hyaluronic acid face serum that intensely hydrates, plumps fine lines, and supports the skin’s moisture barrier while remaining safe for sensitive skin.

This lightweight, richly textured serum combines multiple molecular weights of hyaluronic acid with vitamin B5 (panthenol), glycerin and soothing Thermal Spring Water to deliver deep hydration and help rebuild the skin’s barrier. Designed to absorb quickly, it restores bounce and smoothness without leaving a greasy film and can be layered under moisturizers or used alone morning and night.

How does this serum hydrate and plump skin?

The formula uses a four-part hyaluronic acid system that targets several layers of the skin to maximize moisture retention and visible plumping. High- and low-molecular-weight hyaluronic acids work together to attract and hold water at different depths, while glycerin and vitamin B5 support hydration and barrier recovery.

• Four hyaluronic acid molecules reach multiple skin layers for layered hydration
• Glycerin boosts water retention on the skin surface
• Vitamin B5 helps soothe and assist barrier repair
• Fast-absorbing, non-greasy texture suitable for layering

Will it reduce fine lines and improve texture?

Regular use helps reduce the appearance of fine lines by plumping dehydrated skin and improving elasticity. Clinical and consumer testing cited by the brand shows visible smoothing and plumping effects, with many users reporting quicker recovery in skin suppleness after application.

• Targets dehydrated lines for a visibly smoother look
• Improves skin elasticity and surface bounce
• Shows measurable barrier repair within a short timeframe

Is this safe for sensitive or reactive skin?

Yes — the serum is allergy-tested and dermatologist-reviewed, formulated without aggressive actives that commonly irritate sensitive skin. It also contains La Roche-Posay Thermal Spring Water, known for calming properties, making the product appropriate for those who need gentle but effective hydration.

• Allergy-tested and dermatologist-assessed
• Contains soothing Thermal Spring Water
• Formulated to minimize irritation while delivering hydration

How do I add Hyalu B5 to my daily routine?

Apply 4–5 drops to clean face and neck morning and evening, patting gently until absorbed. Use it on its own or beneath your regular moisturizer; it can also be combined with sunscreen in the morning for layered protection and hydration.

• Use 4–5 drops on cleansed skin, AM and PM
• Layer under a moisturizer or apply alone for a lightweight finish
• Works with sunscreen and other non-conflicting actives

Who is this for: Hyalu B5 is aimed at anyone seeking targeted, non-irritating hydration—especially people with dry, combination, aging, or sensitive skin who want to plump fine lines and reinforce their moisture barrier. It suits both men and women looking for a clinically minded serum that integrates easily into existing regimens without heavy residues.

Ingredients

AQUA / WATER • GLYCERIN • ALCOHOL DENAT. • PROPYLENE GLYCOL • PANTHENOL • PENTYLENE GLYCOL • DIMETHICONE • PEG-6 CAPRYLIC/CAPRIC GLYCERIDES • PPG-6-DECYLTETRADECETH-30 • GLYCERYL ISOSTEARATE • MADECASSOSIDE • SODIUM HYALURONATE • AMMONIUM POLYACRYLOYLDIMETHYL TAURATE • DISODIUM EDTA • HYDROLYZED HYALURONIC ACID • CAPRYLYL GLYCOL • CITRIC ACID • XANTHAN GUM • BUTYLENE GLYCOL • TOCOPHEROL • PHENOXYETHANOL • PARFUM / FRAGRANCE