Among the dazzling stars of skin care ingredients, hyaluronic acid (HA) is undoubtedly the most dazzling star, and has become the basis of countless products with its powerful water-locking ability. However, although traditional high-molecular-weight hyaluronic acid can form a protective film on the surface of the skin, it is difficult to break through the stratum corneum barrier and achieve true deep nourishment. It was not until the emergence of cosmetic grade low molecular weight hyaluronic acid that the industry dilemma of "hydration can only stay on the surface" was completely rewritten.

I. Molecular weight: the key to unlocking penetration

The efficacy of hyaluronic acid is closely related to its molecular weight:

• High molecular weight HA: forms a breathable water film on the skin surface, instantly moisturizing and softening the skin, but difficult to penetrate.

• Low molecular weight HA: The molecular weight is small enough to penetrate the stratum corneum, reach the deep epidermis and even the dermis, and activate moisture from the source.

II. The breakthrough advantage of low-molecular hyaluronic acid

1.Deep penetration, expert in "quenching the thirst" of the dermis
Its tiny molecules can easily penetrate the skin barrier like "water molecule agents", directly transporting moisture to the deep layers of the skin, significantly increasing the water content inside the skin, relieving dryness from the root, and the effect is far better than surface moisturizing.

2.Activate repair and promote collagen regeneration
Research has confirmed (such as published in journals such as "Journal of Cosmetic Dermatology") that low-molecular HA can not only replenish water, but also act as a biological signal molecule to stimulate the activity of skin cells (fibroblasts), promote the synthesis of collagen and elastic fibers, effectively improve fine lines, and enhance skin elasticity, achieving the dual anti-aging effect of "replenishing water and collagen".

3.Strengthen the barrier and improve the skin's "resistance"
After penetrating deep into the epidermis, low-molecular HA can help repair damaged skin barrier structures, increase the water content and integrity of the stratum corneum, thereby enhancing the skin's resistance to external stimuli (such as pollution, ultraviolet rays), and reduce sensitivity and water loss.

4.Synergistic enhancement, the "golden partner" of ingredients
Low-molecular HA can significantly improve the transdermal absorption rate and bioavailability of other effective ingredients (such as vitamin C, vitamin E, peptides, whitening ingredients, growth factors, etc.), becoming the key "penetration enhancement engine" in efficient formulas.

III. Application scenarios: precise positioning of efficient skin care

• Powerful hydrating essence/ampoules: as core ingredients, provide deep hydration and solve endogenous dryness.

• Repair anti-aging products: compounded with anti-aging ingredients (such as retinol, peptides) to promote collagen regeneration and smooth fine lines.

• Sensitive skin repair products: gentle penetration, repair barrier, relieve dryness and redness.

• "One-time" essence/freeze-dried powder: ensure high activity and high concentration to achieve intensive care.

• High-end masks: enhance the penetration depth and immediate/long-term effects of mask essences.

IV. Market trends and consumer awareness upgrade

With the growth of the "ingredient party" group and the popularization of skin science knowledge, consumers' pursuit of skin care product efficacy has shifted from "surface work" to "root improvement". Low-molecular hyaluronic acid has become one of the core ingredient labels of high-end skin care products, medical beauty products and "functional skin care" due to its scientifically proven deep penetration ability and biological activity. Market data shows that the share of products clearly labeled as "low molecular", "hydrolyzed" and "ultra-low molecular weight" hyaluronic acid continues to grow significantly.