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Molecular Weight

The importance of molecular weight in Hyaluronic Acid

In the realm of high-performance biomaterials, Molecular Weight (MW) is the primary determinant of hyaluronic acid's biological activity and rheological performance. While Low Molecular Weight (LMW) HA has gained popularity for its penetrative qualities, High Molecular Weight (HMW) HA (>1.000kDa) remains the gold standard for mimicking the body's endogenous mechanisms.

Endogenous human HA typically reaches a molecular mass of approximately 6.000kDa. By utilizing HMW-HA, formulators can more closely replicate the body's natural extracellular matrix, unlocking superior therapeutic and cosmetic outcomes.

Advanced joint health & viscosupplementation

HMW-HA is the preferred choice for intra-articular applications and joint health supplements due to its superior biomechanical properties.

Optimized rheology and lubrication: HMW-HA significantly outperforms LMW variants in restoring the viscoelasticity of synovial fluid. By increasing fluid viscosity, it provides a robust mechanical buffer that reduces friction and minimizes wear on articular surfaces.

Chondroprotection and matrix synthesis: Research indicates that HMW-HA is more effective at stimulating the expression of aggrecan and type II collagen. It provides a supportive scaffold for chondrocyte proliferation, essential for cartilage repair.

Superior anti-inflammatory signaling: Unlike LMW-HA, which can sometimes act as a pro-inflammatory signaling molecule (DAMP), HMW-HA interacts with CD44 receptors to inhibit inflammatory cytokines, providing a potent "shielding" effect within the joint capsule.

Dermatological excellence: beyond surface hydration

For premium skincare and wound care applications, HMW-HA provides a multi-functional approach to skin integrity.

Advanced barrier function: HMW-HA creates a non-occlusive, viscoelastic film on the stratum corneum. This "breathable" barrier significantly reduces Transepidermal Water Loss (TEWL) and protects the skin from environmental pollutants and mechanical stress.

Accelerated wound healing & tissue repair: While LMW-HA is often associated with early-stage inflammation, HMW-HA governs the remodeling phase of healing. It activates gene pathways responsible for keratinocyte migration and extracellular matrix (ECM) stabilization while suppressing overactive inflammatory responses.

Structural stability: HMW-HA exhibits higher resistance to hyaluronidase degradation compared to LMW-HA, ensuring longer-lasting hydration and a more durable product profile for the end consumer.

References:

  1. Oh, S., Lee, M. K., Park, K., Seo, Y. K., Park, J. M., & Kim, J. Y. (2021). Wound healing promotion by hyaluronic acid: Effect of molecular weight on gene expression and in vivo wound closure. Journal of Dermatological Science, 101(3), 200–208.
  2. Bobrovskaya, M. S., Komarova, T. L., & Potapenko, E. V. (2016). Hyaluronic acid in inflammation and tissue regeneration. Wounds, 28(3), 78–83.
  3. Schiavinato, M., Vianello, D., Gualerzi, A., & Martini, A. (2016). Chondroprotective effect of high-molecular-weight hyaluronic acid on osteoarthritic chondrocytes in a co-cultivation inflammation model with M1 macrophages. BMC Musculoskeletal Disorders, 17(1), 384.
  4. Lee, K., Han, K. M., Jung, H., Shim, D. Y., Lee, G., Kim, J., ... & Kim, B. K. (2024). Hyaluronic acid viscosupplement modulates inflammatory mediators in chondrocyte and macrophage coculture via MAPK and NF-κB signaling pathways. ACS Omega, 9(18), 19163–19171.
  5. Goellner, I., Hoppe, U., & Rippke, F. (2017). Ingestion of an oral hyaluronan solution improves skin hydration, wrinkle reduction, elasticity, and skin roughness: Results of a clinical study. Journal of Evidence-Based Complementary & Alternative Medicine, 22(4), 1081–1088.
  6. Gao, Y. R., Yu, C. Y., Liu, W. J., Li, Y. T., & Zhang, P. (2023). Oral administration of hyaluronic acid to improve skin conditions via a randomized double-blind clinical test. Skin Research and Technology, 29(11).