La Roche-Posay Hyalu B5 Hyaluronic Acid Serum — 4-HA System, Vitamin B5 for Hydration & Plumping (Sensitive Skin, Oil-Free)

La Roche-Posay Hyalu B5 is a super-activated hyaluronic acid facial serum that deeply hydrates and visibly plumps skin while supporting the moisture barrier.

Built around a 4-hyaluronic-acid system plus vitamin B5 and glycerin, this lightweight, oil-free serum is formulated to deliver multi-layer hydration and help restore suppleness. Suitable for sensitive skin and backed by dermatologist testing, the formula absorbs quickly and layers easily under creams or sunscreen for morning and evening use.

How does this serum deliver deep hydration?

The formula uses hyaluronic acids of varying molecular weights so moisture reaches different skin layers for both surface and deeper hydration. Glycerin draws and retains water, while vitamin B5 supports barrier recovery to lock moisture in.

• 4-hyaluronic-acid system targets multiple skin depths for fuller hydration
• Glycerin attracts and holds water to maintain skin softness
• Vitamin B5 helps replenish and repair the moisture barrier
• Light, non-greasy texture that sinks in quickly for layering

Will this serum reduce the look of fine lines and improve texture?

By restoring hydration and bounce, the serum helps soften the appearance of fine lines and creates a smoother skin surface. Instrumental and consumer testing shows improved elasticity and smoother texture following repeated use.

• Plumps dehydration lines for a visibly smoother look
• Supports elasticity to reduce crepey texture over time
• Clinically validated improvements in skin feel and suppleness
• Pairs well with anti-aging creams or SPF for a full regimen

Is this safe for sensitive or reactive skin?

Yes — the product undergoes dermatological and allergy testing and includes La Roche-Posay Thermal Spring Water known for soothing properties. The formula is free of heavy oils and is designed to minimize irritation while providing intensive hydration.

• Allergy-tested and dermatologist-approved for sensitive skin
• Non-comedogenic, oil-free texture reduces pore-clogging risk
• Simple, targeted ingredient blend to limit sensitizing actives
• Can be used twice daily under moisturizer or makeup

How should I incorporate Hyalu B5 into my routine?

Apply 4–5 drops onto cleansed face and neck morning and night, gently pressing the serum into skin for absorption. Follow with a moisturizer to seal hydration and sunscreen during the day to protect results.

• Use on clean skin for best penetration
• Pat gently rather than rubbing to help absorption
• Layer a cream afterward to lock in moisture
• Integrates with both simple and advanced skincare routines

Who is this for: Hyalu B5 fits anyone seeking substantial, non-greasy hydration—especially those with dryness, early signs of aging, or sensitive skin. It's appropriate for men and women who want to restore bounce and smoothness without heavy textures, and for users wanting a dermatologist-tested hyaluronic solution that works under makeup and with additional targeted treatments.

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 . X An Th An Gum . Butyl Ene G Ly Col . Tocopherol . Phenoxyethanol . Parfum / Fragrance. Product packaging may vary.