Hyaluronic Acid vs. Sodium Hyaluronate: What's the Real Difference?

By Michael C. · Written and reviewed by Michael C.

Hydration · Published 2026-06-17 · 10 min read · 1891 words · Updated 2026-09-08

Sodium hyaluronate is the smaller, more stable salt form of hyaluronic acid, and it is what most modern hydrating serums actually contain.

Key takeaways

• Sodium hyaluronate is the sodium salt of hyaluronic acid, smaller and more stable, and it is what most serums actually contain.
• Molecular weight, not the specific name on the label, is what determines whether an ingredient hydrates the surface or penetrates deeper.
• Both must be applied to damp skin and sealed with a moisturiser to avoid drawing moisture out of deeper skin in dry conditions.
• Multi-molecular-weight formulations generally offer more complete hydration than single-weight products.

Source: SkinLabs Editorial Team ()

Cover image: Mahbod Akhzami — credit