La Roche-Posay Hyalu B5 Hyaluronic Acid Serum with Vitamin B5 — Hydrating, Plumping Anti-Aging Serum for Sensitive Skin

La Roche-Posay Hyalu B5 is a concentrated facial serum that delivers multi-weight hyaluronic acid and vitamin B5 to hydrate, plump, and help repair the skin's moisture barrier.

This serum combines several molecular sizes of hyaluronic acid with glycerin and vitamin B5 in a rich yet fast-absorbing texture to restore suppleness and improve skin smoothness. Formulated with La Roche-Posay Thermal Spring Water and allergy-tested for sensitive skin, Hyalu B5 is designed for daily use morning and evening either alone or under a moisturizer to boost hydration and reduce the visible look of fine lines.

How does this serum hydrate different layers of the skin?

Hyalu B5 uses a multi-weight hyaluronic acid system to reach various levels of the skin surface and help retain moisture where it’s needed. Combining high- and low-molecular-weight hyaluronic acids allows the formula to provide immediate surface plumping as well as deeper hydration support.

• Four-part hyaluronic acid system targets multiple skin layers.
• Glycerin enhances moisture attraction and retention.
• Rich texture spreads easily and leaves skin feeling soft.
• Instrumental testing supports rapid recovery of moisture barrier properties.

Will Hyalu B5 help with fine lines and texture?

The serum is formulated to visibly improve skin bounce and smoothness, which can reduce the appearance of fine lines caused by dehydration. Regular use as part of a routine can contribute to a plumper, more even surface that reflects light better.

• Targets dehydrated fine lines by replenishing moisture.
• Madecassoside and vitamin B5 support resilience and repair.
• Clinical and consumer tests report improved texture and hydration results.
• Suitable for layering under creams or makeup for daily wear.

Is it suitable for sensitive or reactive skin?

La Roche-Posay formulates this serum with tolerance in mind: it is allergy-tested, dermatologist-tested, and includes Thermal Spring Water known for soothing properties. The composition avoids harsh actives that often irritate sensitive skin, making it an option to consider for many reactive skin types.

• Allergy-tested and dermatologist-tested for tolerance.
• Contains Thermal Spring Water to soothe skin after application.
• Free from known irritants commonly excluded from sensitive-skin lines.
• Recommended frequency: 4–5 drops, morning and evening.

How do I use Hyalu B5 in my daily routine?

Apply 4–5 drops onto clean face and neck, gently patting until absorbed. It works well alone for concentrated hydration or under your preferred moisturizer to lock in moisture and amplify plumping benefits.

• Use mornings and evenings on cleansed skin.
• Pat 4–5 drops over face and neck; follow with moisturizer.
• Compatible with most serums and creams in a layered routine.
• Allow a moment to absorb before applying makeup.

Who is this for: Hyalu B5 is designed for anyone looking to boost hydration, improve skin texture, and soften the appearance of fine lines—especially people with dry, dehydrated, or sensitive skin who want a dermatologist-tested hyaluronic acid serum. It suits both men and women seeking a reliable daily boost of moisture that layers easily into existing skincare routines.

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