What are the functions of hyaluronic acid?

Jan 24, 2025 Source: Cainiu Health
Disease description:

I am a 25-year-old female who has recently been researching various beauty treatments to improve my skin condition. I have heard the term "hyaluronic acid," but I am not clear about its specific functions. I would like to know what hyaluronic acid does and what precautions should be taken when using it.

Doctor's answer (1)
Dr. Chen Lu

Functions of hyaluronic acid include moisturizing and hydrating the skin, filling and shaping tissues, reducing wrinkles and tightening the skin, and lubricating joints.

1. Moisturizing and hydration: Hyaluronic acid has a strong moisturizing capacity. It can form a breathable film on the skin's surface, preventing water loss through the epidermis. Additionally, it can absorb and retain large amounts of water within the skin's stratum corneum, keeping the skin hydrated, plump, and improving its luster and softness.

2. Filling and contouring: Due to its excellent filling properties, hyaluronic acid can be injected into facial depressions such as the temples, cheeks, and nasolabial folds. This helps fill wrinkles and depressions, restore facial fullness, reshape facial contours, and achieve improved facial appearance and delayed aging effects.

3. Wrinkle reduction and skin tightening: By filling skin wrinkles and fine lines, hyaluronic acid can smooth the skin's surface. Simultaneously, it stimulates the production of collagen in the skin, enhancing skin elasticity, reducing the formation of wrinkles, and making the skin tighter and more vibrant, resulting in a more youthful facial appearance.

4. Joint lubrication: Within the joint cavity, hyaluronic acid is one of the primary components of synovial fluid. It lubricates the joints, reduces friction between joint cartilages, and cushions the pressure generated during joint movement, helping maintain normal joint function and alleviating joint pain.