What is sodium hyaluronate, and how does it differ from hyaluronic acid?
Sodium hyaluronate is the sodium salt form of hyaluronic acid—a molecule naturally produced by the body (in the skin, joints, and the vitreous humor of the eye) that can bind up to 1,000 times its weight in water. Its salt form (sodium hyaluronate) is more stable, more soluble, and has a lower molecular weight than native hyaluronic acid, giving it better tissue penetration. Find our hyaluronic acid line at pharmacies and our anti-aging skincare products enriched with sodium hyaluronate.
- HMW (high molecular weight, > 1,000 kDa) hyaluronic acid: remains on the skin’s surface — forms a moisturizing occlusive film — used in cosmetic injections (high viscosity) and joint viscosupplements — superior mechanical stability
- LMW (low molecular weight, < 50 kDa) sodium hyaluronate: penetrates into the dermis — stimulates collagen synthesis and fibroblast activity — has anti-inflammatory and regenerative effects — preferred for topical serums and dietary supplements
- Native hyaluronic acid vs. hyaluronic acid for the skin: different formulations target different skin layers — combining HMW and LMW in serums = surface hydration + deep regeneration
- Endogenous production: skin fibroblasts and joint synoviocytes synthesize HA — production decreases with age (skin and joints) → wrinkles, loss of volume, osteoarthritis — supplementation supports this natural synthesis
- Safety: Very good skin and systemic tolerance — non-allergenic (no avian proteins in bacterial fermentation forms) — Contraindications: injection into infected or actively inflamed areas — Pregnancy: topical cosmetics are acceptable; injections should be avoided
Cosmetic and Topical Applications
- LMW Hydrating Serums: apply to slightly damp skin (increases absorption by 40%) — before moisturizer — morning and evening — explore our anti-aging serums and our line of anti-aging night creams
- Eye contour care: the most sensitive and thinnest area (0.5 mm vs. 2 mm for the rest of the face) — LMW sodium hyaluronate + caffeine + firming peptides — check out our eye contour care products
- Dry and dehydrated skin: LMW HA + HMW HA + ceramides + niacinamide = gold-standard formula — restores the skin barrier — discover our dry skin care products
- Dry eyes: 0.1–0.3% sodium hyaluronate eye drops — lubricates the cornea + protects the epithelium — safe for contact lens wearers (after removal) — 1–6 instillations per day depending on severity — preservative-free is preferable for multiple-times-daily use
- Aesthetic medicine: dermal injections (wrinkles, cheekbones, lips) — physiological pH + BDDE (cross-linking agent) for longevity (6–18 months depending on the area) — administered only by a licensed physician or nurse — not a substitute for topical treatments
Joint viscosupplementation and dietary supplements
- Viscosupplementation (intra-articular injections): 1–5 injections of sodium hyaluronate into the knee (primarily for knee osteoarthritis) — improves synovial lubrication + reduces inflammation + stimulates the synthesis of endogenous hyaluronic acid (HA) — effectiveness varies across studies (Cochrane 2012: modest benefit) — less effective than corticosteroids in the short term but without systemic side effects — reimbursed in France for stage 2–3 knee osteoarthritis — see our chondroitin and joint care line
- Oral dietary supplements: 50–200 mg/day of bacterially fermented HA (Streptococcus equi, vegan-friendly) — modest oral bioavailability but documented systemic action — 3-month treatment course — combine with type II collagen for joint synergy
- Comprehensive osteoarthritis formulas: sodium hyaluronate + glucosamine + chondroitin + zinc + vitamin C (a cofactor in collagen synthesis)—find our formulas in our herbal joint care line
- Calcium + sodium hyaluronate: calcium is essential for periarticular bone mineralization — a useful combination for degenerative joint diseases with associated osteopenia
- Type II collagen + HA: documented synergy — type II collagen (90 mg/day, undenatured) reduces cartilage degradation — HA improves the viscosity of synovial fluid — the gold-standard combination in advanced joint treatment protocols
Precautions, Dosage, and Quality Criteria
- Topical form: choose LMW sodium hyaluronate (< 50 kDa) for serums—HMW for overnight occlusive creams—free of denatured alcohol (dries out the skin)—free of occlusive silicones—effective concentration ≥ 0.1% in the finished product
- Injectable form: to be administered only by a physician or qualified nurse—strict aseptic technique required—do not inject if there is a local infection or if anticoagulants are being used without medical advice—self-injection not recommended in certain areas (vascular risk)
- Oral forms: bacterial fermentation (Streptococcus equi) = vegan + no avian risk — store in a cool, dry place to maintain stability — enteric-coated tablets or capsules for better absorption — 120–200 mg/day for a 3-month course
- Pregnancy and breastfeeding: topical cosmetic forms are acceptable — cosmetic injections are not recommended (insufficient data) — oral supplements: medical advice recommended
- Drug interactions: no documented systemic interactions for topical and oral forms — intra-articular viscosupplements: avoid with anticoagulants (risk of joint hematoma) — inform your doctor
