It is not produced by the human body – so make sure your diet includes foods that contain this vitamin, and look after your vitamin C supplements and preparations.

Ascorbic acid is also essential for collagen synthesis – it helps maintain healthy connective tissue, strengthens bones and joint flexibility, which is especially important for active people and athletes. It speeds up muscle recovery, supports bruise healing and helps reduce the risk of injury. It can also support cold recovery in people who train regularly, especially during winter. The recommended daily intake of vitamin C for an adult is 45 to 90 mg.