Aids absorption of vitamin A, calcium and phosphorus from food; Good for strong bones and teeth; Protects against osteoporosis; Boosts the immune system; May help in the treatment of cancer; With vitamins A and C, it protects against colds; Helps to maintain a normal heartbeat and efficient blood clotting
Kippers. Mackerel. Salmon. Sardines. Tuna. Free range eggs.
Destroyed in foods by light, oxygen and acids.
Severe tooth decay
City dwellers or anyone subject to smog
Night workers, or anyone whose clothing, environment or lifestyle keeps them out of the sunlight
US RDA: 10mcg
EU RDA: 5mcg