Tag: vitamins

Puritan’s Pride Vitamin Advisor Gives Questionable Advice

The Puritan’s Pride website has a Vitamin Advisor that claims to provide a personalized supplement plan, with expert recommendations chosen just for you. In my opinion it is deceptive, designed not to provide evidence-based personalized health advice, but to sell their products; and one can only wonder what kind of “experts” would support such ill-advised recommendations. Stephen Barrett and I have just...

/ February 9, 2016

Vitamins and Cancer Risk

Vitamins have been promoted as a general panacea, as well as a means of preventing cancer. In reality, high doses of vitamins may even cause cancer.

/ May 6, 2015
Pregnant1

Naturopathy vs. Science: Prenatal Vitamins

This is another post in the naturopathy versus science series, where a naturopath’s medical advice is assessed against the scientific evidence. Today’s topic is brought to you by Toronto naturopath Shawna Darou, who recently published her evaluation of prenatal vitamins. Vitamin supplementation is unnecessary for the vast majority of people. You wouldn’t know this walking through a drug store, where you’ll usually...

/ August 14, 2014
vitamins and supplements

More evidence that routine multivitamin use should be avoided

If scientific evidence guides our health decisions, we will look back at the vitamin craze of the last few decades with disbelief. Indiscriminate use is, in most cases, probably useless and potentially harmful. We are collectively throwing away billions of dollars into supplements, chasing the idea of benefits that have never materialized. Multivitamins are marketed with a veneer of science but that...

/ December 19, 2013
Money and pills

Do vitamins prevent cancer and heart disease?

The US Preventive Services Task Force has released an update on vitamin and mineral supplements to prevent heart disease and cancer. The evidence was not good and did not support taking vitamins as "nutritional insurance."

/ November 21, 2013

Who takes dietary supplements, and why?

If you’re a regular reader of this blog, I’ll bet you’re not a regular consumer of vitamins or supplements. I’m in that group. Aside from sporadic vitamin D in winter, I don’t take any vitamins or supplements routinely, nor do I give any to my children. Your reasons may be close to mine: There is little to no evidence suggesting that dietary deficiencies...

/ February 14, 2013

Andrew Weil/AAFP Article Rejected by Slate

I was asked to write an article for Slate, the on-line magazine, about Andrew Weil’s selection as the keynote speaker for the 2012 AAFP annual scientific assembly. The science and health editor, Laura Helmuth, was initially enthusiastic about what I wrote, but eventually decided not to publish it. Here is the initial draft of my article. My comments follow. Original Draft of...

/ October 30, 2012
Exercise time

Antioxidants and Exercise: More Harm Than Good?

Multivitamin supplementation has been getting a rough ride in the literature, as evidence emerges that routine supplementation for most is, at best, unnecessary. Some individual vitamins are earning their own unattractive risk/benefit profiles: Products like folic acid, calcium, and beta-carotene all seem inadvisable for routine supplementation in the absence of deficiency or medical indication. Vitamin E, already on the watch list,  looks...

/ November 24, 2011

Vitamins and Mortality

The discovery of various vitamins – essential micronutrients that cause disease when deficient – was one of the great advances of modern scientific medicine. This knowledge also led to several highly successful public health campaigns, such as vitamin-D supplementation to prevent rickets. Today vitamins have a deserved reputation for being an important part of overall health. However, their reputation has gone beyond...

/ October 12, 2011

Autism and Prenatal Vitamins

Science has found no evidence that vaccines cause autism; but the true cause(s) of autism have not yet been determined. So far the available evidence has pointed towards a largely genetic cause with possible interaction with environmental factors. A new study supports that interpretation. It also supports previous evidence that autism is triggered prior to birth, rather than at the time of...

/ June 14, 2011