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Vitamins
E and C – Effective Against The Common Cold?
Most people are now familiar with the idea that vitamin C may help protect against and mitigate the symptoms of the common cold, although this theory is by no means universally accepted by orthodox medical opinion. But there’s now evidence that supplements of vitamin E may also play a role in reducing the incidence of infection; leading some commentators to propose that combined supplements of vitamins C and E may be highly effective both as prevention and treatment.
Various recent research studies have
suggested that supplementation with 200 IU of vitamin E, or 1,000
mg of vitamin C may reduce the incidence of colds by between 20
and 25%, although double-blind/placebo experiments have not
always been able to confirm these results. But
even if one remains sceptical about the value of vitamins E and C
as weapons for combatting the
common cold specifically, there’s no doubt that both are highly important in
ensuring the optimal health of the immune system in general, and can therefore
only be of value in warding off the worst effects of this annoying, albeit
usually minor illness. And there’s particularly good
evidence that vitamin E functions as a general immune system
booster, preserving vital red blood cells and stimulating the
body’s production of natural antibodies, effects which have
been shown to be particularly pronounced and important in the
over 60s, whose immune systems are commonly beginning to function
less effectively than those of younger people.
Moreover, vitamins C and E are
probably the body’s two most important anti-oxidants, liquid
and fat-soluble respectively, and crucial in protecting against
the free radical damage to cells and tissue which left unchecked
can lead to premature signs of ageing, and even the degenerative
diseases which cause much of the misery associated with advancing
years. So for their anti-oxidant functions alone it would
be more than worthwhile to ensure an abundant supply of both of
these vitamins.
When considering supplementation with vitamin E it is important to look for the tocopherol form, usually d-alpha tocopherol, which most closely replicates the naturally occurring form of the vitamin in foods such as wheatgerm, dairy produce oily fish and certain nuts and seeds.
As is well known, by far the best
food sources of vitamin C are fresh fruits and vegetables,
especially citrus fruits and juices. But to obtain the kind
of intakes generally recommended for optimal health and the
prevention of colds and other infections, which most nutritional
therapists set at least 1,000 mg (1gram) per day, it is probably
necessary to supplement. Fortunately, ascorbate, the
manufactured form of vitamin C, is highly effective, particularly
when combined with the plant bioflavonoids with which vitamin C
is commonly found in nature. Such supplements are readily
available.
Vitamin C appears to be non-toxic in
almost any quantity which could plausibly be ingested, the only
reported side effect being diarrhea, and even this has been
observed only in cases where tens of grams have been consumed on
a daily basis. Somewhat more caution needs to be exercised
in the case of vitamin E because of its fat solubility.
But even here, however, supplementary doses of several thousand
IU per day – far in excess of the normally recommended
therapeutic dose of around 400 IU, appear to be very safe. The
only likely contra-indication arises because of vitamin E’s
action as an anti-coagulant, meaning that it should not be taken
before surgey or when taking any presecibed blood thinning
medication.
As always in matters of nutrition, however, it is crucial to adopt a holistic approach. And both vitamins E and C will require the presence of an abundant supply of all the vitamins and minerals required by the body if they are to do their work effectively. Even orthodox opinion, therefore, whilst ordinarily inclined to cast doubt upon the therapeutic claims of nutritional therapists, commonly recommends a comprehensive multi-vitamin and multi-mineral suppplement as a valuable element in a daily regime for optimal health.
April 2008
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