Hyaluronic Acid
Not all hyaluronic acid is the same. We use three molecular weights in a deliberate, tiered delivery matrix ÔÇö surface film, mid-layer hydration, and deep reservoir ÔÇö simultaneously.
What is Hyaluronic Acid?
Hyaluronic acid (HA) is a glycosaminoglycan ÔÇö a long polysaccharide chain ÔÇö that occurs naturally in the extracellular matrix of skin, connective tissue, and synovial fluid. In the skin, it acts as the primary hydration reservoir, binding and retaining water molecules at up to 1,000├ù its own weight. As skin ages, endogenous HA production declines significantly: the skin of a 50-year-old contains approximately half the hyaluronic acid of a 20-year-old. Topical sodium hyaluronate (the salt form, more stable in formula) cannot fully replace this loss, but it can meaningfully support surface and mid-layer hydration.
The molecular weight problem
Most HA in skincare uses only high molecular weight (HMW) HA (typically 1,500ÔÇô1,800 kDa). At this size, the molecule cannot penetrate the stratum corneum ÔÇö it sits on the surface, forming a hydrating film. This is effective for immediate plumpness and TEWL reduction, but it does not address deeper dehydration. We add two additional weights: medium molecular weight (200ÔÇô500 kDa) penetrates the outer epidermis; low molecular weight (10ÔÇô50 kDa) reaches the deeper epidermal layers where it provides volumising, plumping hydration from within.
The crosspolymer innovation
In the 24h Regeneration Cream, we also use Sodium Hyaluronate Crosspolymer ÔÇö a chemically crosslinked form of HA that creates a sustained-release moisture reservoir. Instead of all the HA binding water immediately and gradually evaporating, the crosspolymer releases moisture slowly over 24 hours as the skin’s moisture level drops. Independent testing demonstrates maintained skin hydration at the 24-hour mark with crosspolymer vs. depletion by Hour 6 with conventional HA alone.
Why it belongs in the complex
Hyaluronic Acid provides the hydration matrix in which the other actives function more effectively. A well-hydrated dermis has better enzymatic activity (SOD works better), better receptor density (peptide signals are more readily received), and better barrier integrity (Caviar Extract’s lipid repair is better sustained). Hydration is not a supporting role ÔÇö it is a prerequisite for the other mechanisms to reach their potential.
Triple molecular weight delivery: HMW (1,5001,800 kDa)  surface film + TEWL reduction. MMW (200500 kDa)  epidermal penetration + stratum corneum hydration. LMW (1050 kDa)  deeper epidermal volumising. Crosspolymer  24-hour sustained moisture release.