by Dr. Iain Corness
Multi/mega vitamins - the elixir of youth?
I read an interesting article showing
that the retirement age is creeping up. Even in Thailand’s civil service the
retirement age looks like becoming 64. In Australia it is going to be 67.
The world is becoming an old age home!
So we are all living longer, what can we do to get our arthritic hands on
the elixir of youth? If you believe folklore, the answer to aging is
multivitamins. Peddling mega-vitamins is a megabuck industry, credited with
improving your health, your love life and fixing everything from falling
chins to falling arches.
One trend is to take daily doses of antioxidants such as beta carotene,
vitamin A and C or selenium to protect yourself against cancer, heart
disease or signs of premature ageing. There is some scientific ‘proof’ that
people who have a high level of antioxidants in their diet have a lower risk
of heart disease and certain cancers. That is why the nutritionists say we
should eat at least five portions of fruit and vegetables a day. However,
other studies also suggest that taking those same antioxidants in pill form
may not have the same effect and may even be harmful. Who do you believe!
“There’s still conflicting evidence about whether taking certain vitamin
supplements can affect a person’s risk of cancer,” says Dr Alison Ross, at
Cancer Research UK. “These products don’t seem to give the same benefits as
vitamins that naturally occur in our food.”
The British Heart Foundation agrees. A spokesman saying, “Research does not
support the claim that taking extra antioxidants in the form of supplements
will benefit the heart.”
But surely, if this were the case, why do so many people pop the
multivitamin pills? We know we need vitamins, and some of us may have poor
diets. Replenishing the stores is then surely ‘good medicine’?
Let us listen to some experts in the field, and not the back of the cereal
box. Catherine Collins, chief dietitian at St George’s Hospital in London
says, “The whole idea that you must meet some vitamin and mineral target
every day of your life is a marketing myth. You can eat lots of fruit and
veg one day and not much the next but over a week you will still get the
right amount of nutrients. There is very little scientific evidence that
there is any benefit whatsoever in taking a daily multivitamin - even in old
people. You cannot exist on a poor diet then shore yourself up with a
multivitamin. The idea that taking high quantities of vitamins will give you
a health boost - like putting premium petrol in your car - is complete
Dr Toni Steer, nutritionist with the British Medical Research Council’s
Human Nutrition Research in Cambridge, states supplements cannot compete
with real food because when we eat fruits and vegetables the vitamins and
nutrients interact with other chemicals to produce positive effects on the
body. “If these same vitamins are pulled out and isolated in pill form,
there is no guarantee at all that they will have the same effect.”
Another nail in the multivitamin coffin came from the US journal of the
National Cancer Institute which found that men with prostate cancer who took
more than seven multivitamins a week were 30 percent more likely to get an
advanced and fatal form of the disease. This came after a large, though
hotly contested, review published in the journal of the American Medical
Association which found that people who took antioxidant vitamin tablets
(particularly vitamins A and E, and beta-carotene) were more likely to die
earlier than those who did not. Oops! That isn’t something you will read on
the back of the multivitamin bottle.
Let’s look at the old Vitamin C to ward off the common cold, as proposed
many years ago by Linus Pauling. Common claim: one-gram doses will ward off
or even cure the common cold. Reality check: the human body can absorb only
500 milligrams of vitamin C and will excrete the excess. Vitamin C reduces
the average length of a common cold from five days to four and a half - if
you are lucky. Finally, do I take multivitamins? No.
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