Vitamin A

Vitamin A, also known as retinol, has several important functions.

These include:

  • helping your body's natural defence against illness and infection (the immune system) work properly
  • helping vision in dim light
  • keeping skin and the lining of some parts of the body, such as the nose, healthy

Good sources of vitamin A

Good sources of vitamin A (retinol) include:

  • cheese
  • eggs
  • oily fish - such as salmon, sardines, trout, herring or mackerel
  • fortified low-fat spreads
  • milk and yoghurt
  • liver and liver products such as liver p?t? - this is a particularly rich source of vitamin A, so you may be at risk of having too much vitamin A if you have it more than once a week (if you're pregnant you should avoid eating liver or liver products - find out about foods to avoid in pregnancy)

You can also get vitamin A by including good sources of beta-carotene in your diet, as the body can convert this into retinol.

The main food sources of beta-carotene are:

  • yellow, red and green (leafy) vegetables, such as spinach, carrots, sweet potatoes and red peppers
  • yellow fruit, such as mango, papaya and apricots

How much vitamin A do I need?

The total vitamin A content of a food is usually expressed as micrograms (ug) of retinol equivalents (RE).

The amount of vitamin A adults aged 19 to 64 need is:

  • 700 ug a day for men
  • 600 ug a day for women

You should be able to get all the vitamin A you need from your diet.

Any vitamin A your body does not need immediately is stored for future use. This means you do not need it every day.

What happens if I take too much vitamin A?

Some research suggests that having more than an average of 1.5 mg (1,500 ug) a day of vitamin A over many years may affect your bones, making them more likely to fracture when you're older.

This is particularly important for older people, especially women, who are already at increased risk of osteoporosis, a condition that weakens bones.

If you eat liver or liver p?t? more than once a week, you may be getting too much vitamin A.

Many multivitamins contain vitamin A. Other supplements, such as fish liver oil, are also high in vitamin A.

If you take supplements containing vitamin A, make sure your daily intake from food and supplements does not exceed 1.5 mg (1,500 ug).

If you eat liver every week, do not take supplements that contain vitamin A.

What does the Department of Health and Social Care advise?

You should be able to get all the vitamin A you need by eating a varied and balanced diet.

If you take a supplement that contains vitamin A, do not take too much because this could be harmful.

Liver is a very rich source of vitamin A. Do not eat liver or liver products, such as p?t?, more than once a week.

You should also be aware of how much vitamin A there is in any supplements you take.

Women who have been through the menopause and older men, who are more at risk of osteoporosis, should avoid having more than 1.5mg of vitamin A a day from food and supplements.

This means:

  • not eating liver or liver products, such as p?t?, more than once a week, or having smaller portions of these
  • taking no more than 1.5mg of vitamin A a day in supplements (including fish liver oil) if you do not eat liver or liver products
  • not taking any supplements containing vitamin A (including fish liver oil) if you eat liver once a week

Having an average of 1.5mg a day or less of vitamin A from diet and supplements combined is unlikely to cause any harm.

Sexual Health Advice

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This item was in brought to you association with NHS website. Follow the links above for more information and don't forget to check out OutUK's A to Z of Gay Health which features items on everything from relationships, sexual health, mental and physical conditions and how to stay fit. This week our topic is: L - Lung Cancer.
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