Eau Thermale Avène Hydrance Boost Hydrating Serum 1.0 fl oz — 48‑Hour Hydration, Hyaluronic Acid

Eau Thermale Avène Hydrance Boost Concentrated Hydrating Serum is a lightweight, water-gel serum that delivers immediate and lasting hydration for up to 48 hours using hyaluronic acid and Vitamin B3.

This concentrated serum is designed to rapidly replenish moisture in dry or dehydrated skin without a heavy or greasy finish. Its refreshing, fast-absorbing texture supports the skin’s barrier while smoothing the surface for a soft, plump appearance. The formula emphasizes high percentages of naturally derived ingredients and avoids common irritants like parabens, alcohol, oils, silicones and mineral oils.

How does this serum deliver long-lasting hydration?

The Hydrance Boost serum contains moisture-binding humectants that attract and retain water within the skin, helping to maintain hydration over extended periods. Hyaluronic acid provides a hydrating scaffold while the NMF booster encourages the skin’s own moisture mechanisms.

• High molecular weight hyaluronic acid for surface and near-surface hydration
• NMF Booster to stimulate natural skin moisture factors
• Light water-gel texture that locks in moisture without residue
• Clinically observed hydration benefits lasting up to 48 hours

What are the key ingredients and how do they support skin balance?

Key actives were chosen to hydrate, reinforce, and support the skin barrier. Vitamin B3 (niacinamide) helps reinforce barrier function and supports overall skin resilience, while hyaluronic acid and humectants draw moisture into the skin for immediate plumping.

• Vitamin B3 to strengthen and help restore the skin barrier
• Hyaluronic acid for intensive moisture retention and smoothing
• Moisture-binding humectants for sustained hydration effect
• 98% naturally derived ingredients for a simpler formula profile

How should I use the dropper bottle in my skincare routine?

The new dropper delivers precise doses so you can tailor the serum amount to your skin’s needs. Apply it to clean, slightly damp skin and follow with a moisturizer to seal in hydration; it can be used morning and evening or anytime your skin needs an intensive moisture boost.

• Dispense 2–3 drops and gently press into face and neck
• Use on cleansed, slightly damp skin for best absorption
• Layer under your regular moisturizer or sunscreen
• Suitable for daily use or as an intermittent booster for dry periods

Is this formula suitable for sensitive or reactive skin?

The serum is formulated without many common irritants and focuses on gentle hydrating actives, making it appropriate for those who prefer milder formulations. As with any new product, patch testing is recommended if you have known sensitivities.

• Free from parabens, alcohol, oils, silicones and mineral oil
• Formulated without phenoxyethanol, EDTA, BHT, PEG, chlorphenesin and sulfates
• Non-greasy, lightweight texture that minimizes occlusion
• 98% ingredient profile derived from natural sources

Who is this for: This serum is aimed at people with dry, dehydrated or combination skin who want a fast-absorbing, non-greasy hydrating boost. It also suits anyone looking to strengthen their skin barrier and improve moisture retention without introducing heavy oils or silicones. If you prefer light, clinical-feeling textures and value formulas with a high percentage of naturally derived ingredients, this product is a practical addition to both morning and evening routines.

Ingredients

Avene Thermal Spring Water (Avene Aqua), Propanediol Glycerin, Pentylene Glycol Diglycerin, 1.2-Hexanediol, Niacinamide, Sodium Hyaluronate, Betaine, Citric Acid, Fragrance (Parfum), PCA, Polyglyceryl-4 Caprate Sclerotium Gum, Sodium Citrate, Sodium Hydroxide, Water (Aqua).