1.9 Key points about vitamins
Vitamins A, D, E and K are fat-soluble; the remainder are water-soluble.
Adequate amounts of vitamins are required, many on a regular basis, though some can be stored.
A balanced diet should provide the necessary amounts of vitamins, but people on a restricted diet need to take particular care to ensure an adequate intake of all of them.
Deficiency diseases can occur when vitamins are absent or in short supply.
Water-soluble vitamins are easily lost during cooking, and are destroyed by exposure to air and light, so care is needed in food preparation to preserve them.