Tag: vitamin D

Vitamin D for the prevention of COVID-19: A randomized controlled trial

A large clinical trial shows vitamin D supplementation had no effect on COVID-19.

/ March 31, 2022

Vitamin D shows no efficacy against moderate to severe COVID-19 infections

A new trial failed to find evidence that a massive dose of vitamin D improves outcomes in patients with moderate to severe COVID-19 infections.

/ March 4, 2021

When Doctors Refuse to Believe Evidence

Paul Offit's new book covers the evidence for many surgeries, medications, and screening tests that have been proven ineffective and harmful yet are still being used by doctors who refuse to follow the science.

/ November 17, 2020

Vitamin D supplements do not reduce the risk of depression

A newly-published randomized controlled trial finds vitamin D supplementation has no effect on depression. This adds to the long list of medical conditions for which vitamin D supplementation has turned out to be ineffective.

/ August 6, 2020

Vitamin D and Diabetes: Another Case Where Supplementation Sounded Like a Good Idea But Wasn’t

A new study shows vitamin D supplements don't prevent diabetes. But there are still unanswered questions.

/ August 13, 2019

Vitamin D supplements do not reduce the risk of cancer or cardiovascular disease

Vitamin D has been widely touted as beneficial for preventing cancer and cardiovascular disease. A large, well-conducted clinical trial now show that it has no effect.

/ January 10, 2019

Vitamin D and the relationship to colon cancer

Colorectal cancer is common. A new study examines the relationship with vitamin D levels.

/ June 28, 2018

The rise and inevitable fall of Vitamin D

It’s been difficult to avoid the buzz about vitamin D over the past few years. While it has a  long history of use in the medical treatment of osteoporosis, a large number of observational studies have linked low vitamin D levels to a range of illnesses. The hypothesis that there is widespread deficiency in the population has led to interest in measuring...

/ June 23, 2016

Are guidelines for calcium and vitamin D rooted in evidence, or vested interests?

Do osteoporosis guidelines overstate the benefits of calcium and vitamin D supplements? And is their continued presence due to vested interests and conflicts of interest? That’s the provocative argument made by Andrew Grey and Marc Bolland, two endocrinologists who recently detailed their analysis in The BMJ, in a paper entitled “Web of industry, advocacy, and academia in the management of osteoporosis” [PDF]....

/ September 10, 2015

Vitamin D: To Screen or Not to Screen?

Vitamin D, the so-called sunshine vitamin, has generated a lot of attention in recent years. It has been claimed to benefit a wide variety of diseases, everything from cancer to multiple sclerosis. It is widely used along with calcium for bone health. It is added to milk and prenatal vitamins and is prescribed for breastfed babies. Some doctors are recommending everyone take...

/ December 2, 2014