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 Vitamins

Just over 100 years ago, before the discovery of vitamins, scientists knew that certain foods could be used in the treatment of certain conditions. But they didn't know why.

Scientists believed that diseases like scurvy and beriberi were caused by bacteria.

But when a scientist called Christian Eijkman found that a water-extractable factor in rice could prevent beriberi, this notion was turned on its head. And a world of knowledge about vitamins started to open.

In this section, you'll learn more about what scientists have discovered since - and how you can benefit.

Vitamins:
 
 Vitamin C
What it is
What it does for you
How much you need
Which foods have it?
Signs of defiency
How much is too much
New research
 
What is vitamin C?

Vitamin C, or ascorbic acid, is probably the best-known vitamin. It is most often associated with citrus fruit and is known for its ability to boost the immune system, increasing the body's resistance to infections like cold and flu in winter.

But what many people don't know is that vitamin C is an antioxidant that performs a variety of roles in the body. It helps to promote healthy gums and teeth, aids in mineral absorption, and helps heal wounds.

This vitamin is also a water-soluble vitamin that is expressed quantitatively as milligrams.


What vit. C does for you

Vitamin C is a powerful antioxidant that reacts with free radicals. Through this mechanism, the vitamin protects the body from the onslaught of cancer and other diseases of lifestyle.

The vitamin plays an important role in the formation of connective tissue, cartilage, bone matrix, tooth dentin, skin and tendons - making it one of the corner stones of the wound healing process.

Vitamin C is best known for its mechanism of increasing the body's resistance to infection. It also helps to keep the mucous membranes intact.


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How much vitamin C do you need?

The current RDA is 90mg for male adults and 75mg for female adults, but some nutritionists say that 1000mg of vitamin C a day can be taken safely over the long term. The tolerable upper intake limit (UL) is 2000mg per day.

Click here to view a complete list of RDA and UL values.


Which foods have vitamin C?

Papaya, guava, berries, green peppers, rose hips, broccoli, strawberries, kiwi fruit, citrus fruit such as oranges, lemons and naartjies, cabbage and cauliflower.


Signs of vitamin C deficiency

You’re likely to suffer from vitamin C deficiency if you smoke, are exposed to pollution, drink caffeine in any form, are under stress, are recovering from illness or surgery, take aspirin regularly or are over the age of 55.

If you bruise easily, are susceptible to infections and colds, lack energy, have gums that bleed easily and have nosebleeds regularly, it’s likely that you need more vitamin C.


How much vitamin C is too much?

Taking more than 5 000mg (5g) or more may cause diarrhoea and may be harmful to the liver. People who suffer from kidney stones should also avoid large doses.


New research on vitamin C

Vitamin C supplements have been shown to reduce the risk of developing cataracts later in life.

New research also shows that vitamin C may help prevent heart disease and cancer.

People who eat a diet rich in this vitamin may also be at lower risk of suffering strokes, and smokers who do so may benefit the most, research shows.







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