A surgical mask next to an open pill bottle that’s toppled over, spilling out red capsules meant to represent vitamin D supplements.
Vitamin D Likely Doesn’t Prevent COVID-19, Studies Find
The results from two large clinical trials don't support the idea that supplements of the vitamin bolster immune defenses against SARS-CoV-2.
Vitamin D Likely Doesn’t Prevent COVID-19, Studies Find
Vitamin D Likely Doesn’t Prevent COVID-19, Studies Find

The results from two large clinical trials don't support the idea that supplements of the vitamin bolster immune defenses against SARS-CoV-2.

The results from two large clinical trials don't support the idea that supplements of the vitamin bolster immune defenses against SARS-CoV-2.

vitamin D
GENETIC PREDISPOSITION TO VITAMIN D DEFICIENCY CONTRIBUTES TO SEVERE COVID-19
Genetic Predisposition to Vitamin D Deficiency Contributes to Severe COVID-19
Iris Kulbatski, PhD | Aug 15, 2022
Ana Teresa Freitas discusses how individual variation in vitamin D synthesis and metabolism influences susceptibility to upper respiratory viruses.
Closeup of a person pouring several dietary supplement capsules into their open palm.
Vitamin D Pills Don’t Prevent Bone Fractures, Osteoporosis: Study
Dan Robitzski | Jul 28, 2022
A large trial adds to a growing list of conditions once thought to be helped by vitamin D supplementation.
Two fingers grasp a vitamin D capsule
Vitamin D Deficiency Drives Opioid Addiction in Mice
Amanda Heidt | Jun 16, 2021
Mice with low vitamin D had exaggerated craving for opioids and felt the drugs’ effects more strongly—results supported in part by human medical records—suggesting that supplements should be explored as treatments for opioid use disorders.
Pandemic Accelerates Trend Toward Remote Clinical Trials
Jef Akst | May 1, 2021
Now more than ever before, recruiting patients for a research study doesn’t have to mean getting them to leave their homes.
a hand making a "stop" signal at an incoming coronavirus particle
Scientists’ Advice for Ways to Ward Off the Coronavirus
Shawna Williams | Oct 9, 2020
We asked experts for measures people can take that may help boost defenses against COVID-19 and other respiratory diseases.
Trials Seek to Answer if Vitamin D Could Help in COVID-19
Abby Olena | Aug 12, 2020
In clinical studies worldwide, researchers are testing the possibility that supplements of the vitamin could prevent or decrease the severity of SARS-CoV-2 infections.
Mutagens and Multivitamins
Megan Scudellari | Jun 1, 2014
Not one to shy away from controversy, Bruce Ames has pitted himself against industry groups, environmentalists, and his peers through his work identifying DNA mutagens. And he’s not done yet.
Contributors
The Scientist Staff | Oct 1, 2012
Meet some of the people featured in the October 2012 issue of The Scientist.
Suspected Effects of Vitamin D
Amy Maxmen | Mar 1, 2012
Vitamin D has a variety of actions in the body. It binds to the vitamin D receptor (VDR), which then binds to the retinoid X receptor (RXR) and activates the expression of numerous genes. 
Tricky Trials
Mary Beth Aberlin | Mar 1, 2012
Studies on safety, efficacy, or dosing of drugs in children, or on nutritional supplements, are not run-of-the-mill.
Vitamin D on Trial
Amy Maxmen | Mar 1, 2012
Prevention trials for vitamins and supplements are notoriously difficult, but some researchers aren’t giving up on finding proof that vitamin D helps ward off disease.
Inside the mind of Fritz Kahn
Cristina Luiggi | Feb 1, 2011
For more than 40 years, German gynecologist and legendary science writer Fritz Kahn (1888-1968) captured the imagination of an international audience with hundreds of wildly inventive illustrations and more than a dozen popular science books. 
Light Therapy, circa 1939
Cristina Luiggi | Feb 1, 2011
Around the turn of the 20th century—before sunscreens hit the market and the damaging effects of UV radiation were widely appreciated—physicians saw the sun mostly as a source of healing.