The ingredient narratives reshaping clean beauty.
Sodium Hyaluronate (HA Molecular-Weight Series)
aka sodium hyaluronate · low molecular weight ha · high molecular weight ha · ha multi-weight
The salt form of hyaluronic acid — what 'HA' on most clean labels actually means. The 2024–2025 sophistication is the multi-MW serum: combining ultra-low MW (≈5 kDa, deeper penetration), low MW (~50 kDa), medium MW (~1 MDa), and high MW (>1 MDa, surface film) for layered hydration. Vichy Minéral 89, Skinceuticals H.A. Intensifier, and The Ordinary's Multi-Peptide HA all formalize the multi-weight approach.
- graded hydration from surface film to upper-dermal depth
- ultra-low MW fragments may signal repair (controversial but emerging data)
- compatible with virtually any skincare system
- multi-MW hydration serums
- post-acid recovery
- injectable-adjacent topical 'HA boosters'
0.1–2% per MW fraction; total HA in a serum rarely exceeds 2% by weight. Crosslinked HA (in injectables and a few topical wraps) is a distinct category. Pairs with NMF (PCA, glycerin), peptides, and ceramides.
Low-humidity climates: HA without an occlusive can pull water from the dermis upward and outward, leaving skin drier. Always seal with a cream or oil.
Universally trusted.
The ingredient narratives reshaping clean beauty.
Sodium Hyaluronate (HA Molecular-Weight Series)
aka sodium hyaluronate · low molecular weight ha · high molecular weight ha · ha multi-weight
The salt form of hyaluronic acid — what 'HA' on most clean labels actually means. The 2024–2025 sophistication is the multi-MW serum: combining ultra-low MW (≈5 kDa, deeper penetration), low MW (~50 kDa), medium MW (~1 MDa), and high MW (>1 MDa, surface film) for layered hydration. Vichy Minéral 89, Skinceuticals H.A. Intensifier, and The Ordinary's Multi-Peptide HA all formalize the multi-weight approach.
- graded hydration from surface film to upper-dermal depth
- ultra-low MW fragments may signal repair (controversial but emerging data)
- compatible with virtually any skincare system
- multi-MW hydration serums
- post-acid recovery
- injectable-adjacent topical 'HA boosters'
0.1–2% per MW fraction; total HA in a serum rarely exceeds 2% by weight. Crosslinked HA (in injectables and a few topical wraps) is a distinct category. Pairs with NMF (PCA, glycerin), peptides, and ceramides.
Low-humidity climates: HA without an occlusive can pull water from the dermis upward and outward, leaving skin drier. Always seal with a cream or oil.
Universally trusted.