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vitamins and minerals
Most people should be able to get all the nutrients
they need by eating a varied and balanced diet.
But if you choose to take supplements,
it's important to know that taking too much or
taking them for too long can cause harmful effects.
So if you choose to take supplements, make sure you're informed.
The advice given in this section is aimed at adults.
What are vitamins?
Vitamins are essential nutrients that your body needs in small amounts
to work properly. There are two types of vitamins:
fat-soluble and water-soluble.
Fat-soluble vitamins
Fat-soluble vitamins are found mainly in fatty foods such as animal fats
(including butter and lard), vegetable oils, dairy foods, liver and oily fish.
Your body needs these vitamins every day to work properly.
However, you don't need to eat foods containing them every day.
This is because, if your body doesn't need these vitamins immediately,
it stores them in your liver and fatty tissues for future use. This means
the stores can build up so they are there when you need them. If you
have much more than you need, fat-soluble vitamins can be harmful.
These are all fat-soluble vitamins:
- vitamin A
- vitamin D
- vitamin E
- vitamin K
Water-soluble vitamins
Water-soluble vitamins are not stored in the body, so you need to have
them more frequently.
If you have more than you need, your body gets rid of the extra vitamins
when you urinate. Because the body doesn't store water-soluble vitamins,
generally these vitamins aren't harmful.
Water-soluble vitamins are found in fruit, vegetables and grains. But unlike
fat-soluble vitamins, they can be destroyed by heat or by being exposed
to the air. They can also be lost in the water used for cooking.
This means that by cooking food, especially boiling, we lose lots of these
vitamins from the food we eat. The best way to keep as much of the
water-soluble vitamins as possible is to steam or grill, rather than boil.
These are all water-soluble vitamins:
- vitamin B6
- vitamin B12
- vitamin C
- biotin
- folic acid
- niacin
- pantothenic acid
- riboflavin
- thiamin
What are minerals?
Minerals are essential nutrients that your body needs in small amounts to
work properly. We need them in the form they are found in food.
Minerals can be found in varying amounts in a variety of foods such as
meat, cereals (including cereal products such as bread), fish, milk and
dairy foods, vegetables, fruit (especially dried fruit) and nuts.
Minerals are necessary for three main reasons:
- building strong bones and teeth
- controlling body fluids inside and outside cells
- turning the food we eat into energy
These are all essential minerals:
- calcium
- iron
- magnesium
- phosphorus
- potassium
- sodium
- sulphur
What are trace minerals?
Trace minerals are also essential nutrients that your body
needs to work properly, but in much smaller amounts than
vitamins and minerals. Trace elements are found in small
amounts in a variety of foods such as meat, fish, cereals,
milk and dairy foods, vegetables and nuts.
These are all trace elements:
- boron
- cobalt
- copper
- chromium
- fluoride
- iodine
- manganese
- molybdenum
- selenium
- silicon
- zinc
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