Glucosamine
Glucosamine lays down the foundation for the everyday rebuilding of the connective tissues around the joints, including tendons, ligaments and cartilage. Connective tissues are continuously being remodeled as they are worn away during activity and then reformed afterwards. As we agewe become less efficient at renewing these tissues (especially cartilage).

Glucosamine is a major building block of proteoglycans and glycosaminoglycans (GAGs) - two of the main structural components of cartilage. Whilst glucosamine is a natural amino sugar already present in the body, it cannot be easily obtained from diet as it is found in only a small number of foods.

COD LIVER OIL & OMEGA-3 FATTY ACIDS
Cod liver oil and fish oils are important sources of the omega-3 EPA and DHA (eicosapentaenoic acid and docosahexaenoic acid) fatty acids that are so vital to health. They are found in the membranes of every single cell in the body. These omega-3 fats can be made in the body but are predominantly obtained from diet. They can be found in oily fish like mackerel, herring and salmon. In the body these fatty acids play a role in keeping joints supple and flexible and help maintain a healthy heart and circulation.

Like glucosamine, chondroitin is a building block of proteoglycans (one of the main structural components of cartilage). Hyaluronic acid is a major component of synovial fluid which is the lubricating fluid in joints. Whilst chondroitin is a natural amino sugar already present in the body, it cannot be easily obtained from diet as it is found in only a small number of foods.

VITAMIN D
Vitamin D can be obtained from food but, uniquely among vitamins, its main method of production is via the skin’s exposure to sunlight. It is widely known that vitamin D is needed to aid the absorption of calcium into bones, but there is lower awareness that vitamin D is also needed to ensure the optimal function of the connective tissues found in muscles. (People who seldom leave their homes or who cover up completely may not always be able to produce sufficient levels of vitamin D.)