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Ha
Hyaluronic acid
Hyaluronic acid

Hyaluronic acid (HA), is a naturally occurring glycosaminoglycan found throughout the body's connective, epithelial, and neural tissues. Most abundantly present in the skin, eyes, and synovial fluid, HA is renowned for its exceptional capacity to retain moisture — a single gram can hold up to six liters of water.

In skincare, the primary appeal of hyaluronic acid lies in its unparalleled hydrating abilities. As a humectant, HA attracts and retains moisture from the environment, thereby providing intense hydration to the skin. This hydrating property contributes significantly to maintaining skin plumpness, suppleness, and elasticity.

Beyond hydration, hyaluronic acid also plays a vital role in skin repair and regeneration. It supports the skin's healing and repair processes, and its anti-inflammatory properties make it beneficial in calming irritated skin. Moreover, HA's ability to promote the production of collagen, a crucial protein for skin elasticity, further underscores its anti-aging benefits.

The molecular size of hyaluronic acid influences its skin penetration and efficacy. High molecular weight HA remains on the skin's surface, providing hydration and forming a barrier against moisture loss. In contrast, low molecular weight HA penetrates deeper into the skin's layers, offering more profound hydrating and rejuvenating effects.

Hyaluronic acid's remarkable ability to hydrate, improve skin elasticity, aid in wound healing, and provide antioxidant protection makes it a valuable component in managing a variety of dermatological conditions, particularly those related to aging, dryness, and sensitive skin.

Physiological Effects of Hyaluronic acid
  1. Hydration: Hyaluronic acid is a powerful humectant that can hold up to 1000 times its weight in water, significantly enhancing skin hydration and leading to plumper, more hydrated skin.
  2. Skin Elasticity and Wrinkle Reduction: By increasing skin moisture, it improves skin elasticity, reduces the appearance of fine lines and wrinkles, and gives the skin a more youthful appearance.
  3. Wound Healing: It plays a role in wound healing due to its ability to regulate inflammation levels and signal the body to build more blood vessels in the damaged area.
  4. Barrier Enhancement: Hyaluronic acid helps reinforce the skin's natural barriers, protecting against environmental factors and retaining moisture.
  5. Antioxidant Properties: It provides antioxidant defense against free-radical damage from the sun and pollution.
Role in Managing Dermatological Conditions
  1. Aging Skin: Its ability to reduce wrinkles and improve skin elasticity makes it popular in anti-aging skincare products.
  2. Dry Skin: Hyaluronic acid is beneficial in treating dry skin conditions by providing intense hydration.
  3. Wound Care: Its role in wound healing is leveraged in post-procedure care, such as after laser treatments, and in healing minor cuts and abrasions.
  4. Acne Scars: It can help in the treatment of acne scars by promoting skin regeneration and reducing inflammation.
  5. Sensitive Skin: Due to its gentle nature, hyaluronic acid is suitable for sensitive skin, providing hydration without causing irritation.
References
  • Papakonstantinou, E., Roth, M., & Karakiulakis, G. (2012). Hyaluronic acid: A key molecule in skin aging. Dermato-endocrinology.
  • Jegasothy, S. M., Zabolotniaia, V., & Bielfeldt, S. (2014). Efficacy of a new topical nano-hyaluronic acid in humans. The Journal of Clinical and Aesthetic Dermatology.
  • Wollina, U., & Abdel-Naser, M. B. (2019). Hyaluronic acid in the treatment and prevention of skin diseases: Molecular biological, pharmaceutical and clinical aspects. Skin Pharmacology and Physiology.