What are the functions of hyaluronic acid?
Sep 12, 2025
Source: Cainiu Health
Dr. Lv Renrong
Introduction
Under normal circumstances, hyaluronic acid, as a common moisturizing and beauty ingredient, functions primarily to deeply hydrate and retain skin moisture, improve fine lines, fill facial depressions, enhance skin elasticity, and protect joint cartilage. When using hyaluronic acid products or undergoing related beauty treatments, it is important to choose legitimate products and professional institutions, and to understand your own suitability for such treatments.
Generally, hyaluronic acid, as a common moisturizing and beauty ingredient, has multiple functions including deep hydration, improving skin fine lines, filling facial depressions, enhancing skin elasticity, and protecting joint cartilage. The specific effects are as follows:
1. Deep Hydration and Moisture Retention: Hyaluronic acid has an extremely strong water-absorbing capacity, capable of absorbing hundreds of times its own weight in water. When applied to the skin surface, it can form a moisturizing film on the stratum corneum to reduce water loss. When injected or added to skincare products, it can penetrate into the deeper layers of the skin to replenish moisture for dry skin.
2. Improving Skin Fine Lines: For dryness-induced skin lines and fine lines, hyaluronic acid can plump up the skin by rehydrating, restoring the dried and contracted skin to a fuller state, thereby gradually reducing the appearance of fine lines. It is especially suitable for areas prone to dry lines, such as around the eyes and forehead, helping to maintain smooth skin texture.
3. Filling Facial Depressions: As a commonly used filler in aesthetic medicine, hyaluronic acid can be injected into facial depressions such as the temples, apple muscles, and nasolabial folds. By providing filling and support, it makes the depressed areas fuller, improves facial contours, and enhances the softness and firmness of facial lines.
4. Enhancing Skin Elasticity: Hyaluronic acid provides hydration support to the dermal layer of the skin, promoting the synthesis and maintenance of skin collagen, thus enhancing the skin's resilience and elasticity. Long-term use of hyaluronic acid-containing skincare products or related treatments can reduce skin laxity and help maintain tight, elastic skin.
5. Protecting Joint Cartilage: In the synovial fluid of human joints, hyaluronic acid is an important component that lubricates the joints and reduces cartilage friction. When externally supplemented or through medical intervention, it helps maintain joint lubrication, reduces joint wear, alleviates joint discomfort, and protects the health of joint cartilage.
When using hyaluronic acid products or undergoing related aesthetic treatments, it is important to choose genuine products and professional institutions, understand your own suitability, and follow the correct usage methods or medical advice to ensure effectiveness and safety.
