However, these symptoms could also indicate other disorders. The disease caused by a chronic vitamin C deficiency is scurvy, which used to be common among people who did not have fresh fruit and vegetables in their diets, such as sailors on long sea voyages. Today, scurvy is very seldom seen. Safety Prolonged high level supplementation may have a certain laxative effect and some individuals may experience diarrhoea and cramps at high doses. The ingestion of large amounts of Vitamin C is contra-indicated in cases of renal insufficiency.
Calcium helps build and maintain healthy bones and teeth.
It also plays a role in regulating the heartbeat, and is required for nerve transmission and in the process of blood-clotting. Where you get it Dark green leafy vegetables, sardines, clams, oysters and soya beans. Although the RDA for adults is 800mg, a supplementary intake of up to 1 500mg is considered safe. Too much calcium can result in hypercalcaemia, which leads to excessive calcification in bone and soft tissue, and can also interfere with iron and zinc absorption. Where you get it Common table salt, seafood, meat, eggs, milk and milk products.