The HYALURONIC ACID (HA) content of an average person of 70 kg is about 15 grams of which 50% is found in the skin and 35% in the muscles. Furthermore, HA has the ability to bind extremely large amounts of water, up to six liters per gram. For example the glass body of a human eye contains 98% of water, which is bound to only 2% of HA. [wikipedia]

Basically HA is found or exists in all collagen based connective tissues like (muscles, tendons, ligaments, joints, bones (matrix)).

The HA also serves as a lubricant for all of our joints and is therefore used for years in medicine - especially for older people to help respectively to free them from their pain by injecting a slightly thicker HA gel directly into joints.

Results of an objective skin surface assessment with microscopic analyzes.

This study was commissioned by the following institutions:

Center for Health Care, Osaka University of Foreign Studies
R & D Div., Q.P. Corporation / Institute of General Medical Science

In summary it could be measured using three-dimensional microscopes, that skin smoothness and moisture have been improved by oral ingestion of hyaluronic acid.

Same as collagen, the proportion of hyaluronic acid decreases in skin with age. Therefore, in the past a variety of products have been marketed with hyaluronic acid, all on the purpose to maintain skin and keep it young.