Hyaluronic acid, or HA, is a naturally occurring polymer found in every tissue of the body. It is particularly concentrated in the skin (almost 50% of all HA in the body is found in the skin) and synovial fluid. It povides support for a healthy and youthful appearance by hydrating and smoothing the skin in addition to moderating the appearance of fine lines and age spots. Hyaluronic acid also supports joint function and comfort by promoting healthy synovial fluid.

For skin cells, the ability of HA to attract and retain water is essential for proper cell-to-cell communication, hydration, nutrient delivery, and waste and toxin elimination. HA also appears to support the skin by promoting healthy turnover and renewal of keratinocytes, moderating the appearance of fine lines and age spots.