What does the glucosamine in this gel do when applied to the skin? — Joint Gel with Glucosamine, 200 ml – White Pharma

The glucosamine sulfate in this gel is used as part of a topical cosmetic formula. This substance is naturally found in the body's cartilage and joint fluid. In this gel, it is applied to the skin around joints and muscles, such as the knees or shoulders, to be part of the skin-care aspect of your massage routine. It is not intended as an internal supplement, and it works alongside other ingredients like sodium hyaluronate and panthenol to support skin comfort and texture in the areas you apply it.

For a benefit that addresses the joints from within, you would need to consult a specialist regarding oral supplements. This gel is intended for external cosmetic use to help the skin around joint areas feel smoother and more flexible when massaged.