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As effectiveness, safety, and consumer expectations in skincare products become increasingly important, cosmetic actives with scientifically proven efficacy form the fundamental building blocks of modern formulations. Among these actives, Hyaluronic Acid (HA) stands out due to its exceptional moisture-retention capacity and high biocompatibility, making it one of the indispensable ingredients in modern cosmetic and dermocosmetic products.
Naturally present in human skin, Hyaluronic Acid plays a critical role in maintaining moisture balance, which declines with age. For this reason, it is widely used in formulations targeting skin concerns such as dryness, loss of elasticity, fine lines, and weakened skin barrier function. Its use in cosmetic products contributes to a plumper, smoother, and healthier-looking skin.
Today, consumers’ expectations for intense hydration, immediate effect, and long-lasting comfort have made Hyaluronic Acid essential across a broad range of products—from serums and creams to masks and eye-area treatments. Its ability to deliver different mechanisms of action depending on molecular weight further enhances its formulation flexibility and technical value.
Hyaluronic Acid:
Increases the skin’s moisture-holding capacity and provides long-lasting hydration
Helps reduce the appearance of fine lines and dryness-related wrinkles
Gives the skin a plump, smooth, and radiant appearance
Supports the skin barrier, reducing sensitivity and the feeling of dryness
Is compatible with all skin types and is particularly suitable for dry and sensitive skin
Hyaluronic Acid is available in:
Low-, medium-, and high-molecular-weight forms, offering
Different penetration and efficacy profiles
This allows formulators to target surface hydration, deep moisturization, or a plumping effect, depending on the purpose of the formulation.
✔️ High molecular weight Hyaluronic Acid (HMW-HA) forms a protective film on the skin surface, reducing transepidermal water loss (TEWL). Due to this property, it is an ideal active ingredient for topical applications aimed at surface hydration and strengthening the skin barrier.
✔️ Medium molecular weight Hyaluronic Acid (MMW-HA) provides moderate skin penetration and hydration. By balancing the properties of high (HMW) and low (LMW) molecular weight hyaluronic acid, it is preferred in formulations designed to deliver effective hydration both on the skin surface and within the upper epidermal layers.
✔️ Low molecular weight Hyaluronic Acid (LMW-HA) can partially penetrate deeper layers of the epidermis and may support biological processes such as cell proliferation, collagen synthesis, and wound healing. However, since very low molecular weight (<50 kDa) hyaluronic acid forms have been reported to potentially trigger inflammatory responses in certain cases, careful optimization is required when incorporating these forms into product formulations.
The ability to design Hyaluronic Acid at specific molecular weights—or to combine multiple molecular weights within a single formulation—enables the development of multifunctional cosmetic products that hydrate, protect, and biologically support the skin at different layers.
In cosmetic formulations, Hyaluronic Acid is commonly used in:
Facial serums
Moisturizing creams and lotions
Eye care products
Mask and ampoule formulations
Dermocosmetic products designed to strengthen the skin barrier
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