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Hyaluronic acid is a naturally occurring substance that helps retain moisture in the skin and eyes and lubricates the joints. It also plays a crucial role in wound healing by controlling inflammation and redirecting blood flow to damaged tissue. Hyaluronic acid levels decrease as people age, and this may contribute both to the physical signs of aging, such as wrinkles, and to age-related conditions, including osteoarthritis. Although hyaluronic acid is present in numerous cosmetic and medical products, its effects can vary from person to person. (责任编辑：) |