Vitamins from A to Zinc: A reality check

Almost 40 per cent of adults saythey have taken vitamin and mineral supplements,Statistics Canada reports, but the practice may be worth rethinking, nutrition and medical experts say.

Decades ago, nutritional deficiencies were common among the general population in Canada.Since then, staple foods such as milk, flour and table salt have been fortified with vitamins and minerals to address those deficiencies.

In the last three years, study after peer-reviewed study have shownnext to no measurable health benefitsfrom common store-bought vitamins or multivitamins for otherwise healthy people.

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Most family physicians won't discourage taking vitaminsbecause there are few risks.

But why werevitamins so popular in Statistics Canada's 2009 report?

"There's a certain amount of guilt about not eating well, and that's an easy fix," said nutritionProf.Mary L'Abbat the University of Toronto. "'Hmm, I've skipped meals, we didn't have breakfast, we didn't do lunch,' and that's often what people are doing, using it as an insurance policy.But it's only half-coverage."

Vitamins for health

9 years ago

Duration 2:41

How much value do they have for the average person?

Small segments of the Canadian population show inadequate vitaminintake,but it's often because people are making poor nutritional choices, such as drinking lots of sweetened beverages that don't offer many nutrients, L'Abb said.

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"If you look at the scientific evidence in terms of nutrition and health outcomes, the biggest problems aren't from vitamin or mineral deficiency.They're from too many calories, too much sodium, high trans fat, high sugar intake, not enough fruits and vegetables. The things that characterize healthy diets, that's the biggest predictors of being healthy later on in life."

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There are some cases when doctors will recommend supplements, such as vitamin D for breastfed infants, adults who don't get enough sun or in some patients after surgery.

When family physician Dr. Nav Persaud of St. Michael's Hospital in Toronto talks to patients about all the pills they're taking, he often discusses the pros and cons of taking vitamins.

"For example, folic acid is a vitamin that's in many multivitamins," Persaud said. "Folic acid does help prevent certain birth defects. But when older people take folic acid, it may well increase the risk of cancer without providing any benefit."

Julie Meathrell of London, Ont., used to take vitamin supplements based on the advice of friends and from reading books and online sources until the costs added up.

"I would say probably anywhere from $70 to $80 a month," sherecalled.

Meathrell decided to ditch her supplements andnow gets her vitamins from fruits and vegetables.