The ingredient narratives reshaping clean beauty.
Hyaluronic Acid
aka sodium hyaluronate · ha · hyaluronan · low molecular weight hyaluronic acid
The default humectant of modern skincare and the ingredient most consumers can name. Once extracted from rooster combs, today's cosmetic-grade HA is almost entirely produced by bacterial fermentation of Streptococcus zooepidemicus on glucose substrate — a quiet biotech win. The 2025–2026 conversation has moved past 'does HA work?' to molecular weight literacy: high-MW (>1,000 kDa) films the surface, low-MW (~50 kDa) and ultra-low (<10 kDa) penetrate deeper for plumping. Multi-weight stacks are now the formulation default at Kosas, Rhode, Tatcha, and Necessaire.
- binds up to 1,000x its weight in water
- multi-weight stacks deliver hydration at multiple skin depths
- well-tolerated across all skin types and conditions
- hydrating serums
- essences
- eye creams
- post-procedure recovery
Sodium hyaluronate is the salt form used in most formulas (better stability, easier dispersion). Pairs with PGA, glycerin, ceramides, and barrier lipids. In dry climates, layer on damp skin and seal with an occlusive — otherwise HA can pull moisture from the dermis.
'Hyaluronic acid' on a label tells you nothing about molecular weight, concentration, or how many fractions are blended — ask for specifics. Cross-linked HA used in injectables is not the same molecule as topical HA.
Strongly trusted — biotech-fermented, vegan, biodegradable. Effectively the unobjectionable humectant.
The ingredient narratives reshaping clean beauty.
Hyaluronic Acid
aka sodium hyaluronate · ha · hyaluronan · low molecular weight hyaluronic acid
The default humectant of modern skincare and the ingredient most consumers can name. Once extracted from rooster combs, today's cosmetic-grade HA is almost entirely produced by bacterial fermentation of Streptococcus zooepidemicus on glucose substrate — a quiet biotech win. The 2025–2026 conversation has moved past 'does HA work?' to molecular weight literacy: high-MW (>1,000 kDa) films the surface, low-MW (~50 kDa) and ultra-low (<10 kDa) penetrate deeper for plumping. Multi-weight stacks are now the formulation default at Kosas, Rhode, Tatcha, and Necessaire.
- binds up to 1,000x its weight in water
- multi-weight stacks deliver hydration at multiple skin depths
- well-tolerated across all skin types and conditions
- hydrating serums
- essences
- eye creams
- post-procedure recovery
Sodium hyaluronate is the salt form used in most formulas (better stability, easier dispersion). Pairs with PGA, glycerin, ceramides, and barrier lipids. In dry climates, layer on damp skin and seal with an occlusive — otherwise HA can pull moisture from the dermis.
'Hyaluronic acid' on a label tells you nothing about molecular weight, concentration, or how many fractions are blended — ask for specifics. Cross-linked HA used in injectables is not the same molecule as topical HA.
Strongly trusted — biotech-fermented, vegan, biodegradable. Effectively the unobjectionable humectant.