Vitamin C (ascorbic acid) is one of the water-soluble vitamins and, as an antioxidant, is involved in numerous body functions.

The vitamin contributes to 
- a normal function of the immune system 
- the protection of cell constituents from oxidative stress
- normal collagen formation
- the normal function of bones, teeth, cartilage, gums, skin and blood vessels
- the normal function of the nervous system
- normal energy-yielding metabolism
- and can contribute to the reduction of tiredness and fatigue

The following groups of people may have higher vitamin C requirements:
Adolescents, pregnant and breastfeeding women, athletes, elderly people and smokers.

Sources: Citrus fruits, kiwis, strawberries, potatoes, bell peppers, cruciferous vegetables and green, leafy vegetables.