Recently Added

Coffee and Prostate Cancer Risk

1/15/2021
Is drinking coffee associated with prostate cancer risk? Find out what a recent study suggests in our updated answer to the question: Does drinking coffee increase or decrease the risk of cancer? Can it slow cancer progression?

Vitamin D for Colds and Flu?

1/14/2021
Does monthly high-dose vitamin D help prevent colds and flu or lessen symptoms in older people? Find out what a recent study showed in the What It Does section of our Vitamin D Supplement Review. Also, see our Top Pick for vitamin D.

Vitamin K & Risk of COVID Death

1/14/2021
A marker of low vitamin K levels has been linked to a higher risk of death in people with COVID-19, according to a new study. Get the details in the COVID-19 section of our Vitamin K Supplements Review.

Vitamin D & Risk of COVID Death

1/12/2021
A recent study in the U.S. found that people hospitalized with COVID had much lower rates of death with certain blood levels of vitamin D. Get the details in the COVID-19 section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.

High-Dose Vitamin C for COVID-19?

1/12/2021
Does high-dose vitamin C help in people with severe COVID-19? See what a new study showed in the COVID-19 section of our Vitamin C Supplements Review.

Nicotinamide Riboside to Slow Aging and Reverse NAD+ Decline?

1/12/2021
Nicotinamide riboside, a form of niacin, has been promoted to slow aging, partially based on the belief that it raises NAD+ levels that fall with age. A new study raises doubts about this. Get the details in the Niacin section of our B Vitamin Supplement Review. Also, learn about a concern with taking too much nicotinamide riboside.

Vitamin D and COVID-19

1/09/2021
Many preliminary studies have linked adequate vitamin D levels with reduced risk of COVID-19 or less severe disease. However, a recent study did not find a benefit among people who had been supplementing with amounts generally above the recommended daily intake requirement for vitamin D. See the details in the COVID-19 section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.

Magnesium, Niacin and Blood Pressure

1/09/2021

Two studies this week showed the risk of high blood pressure to be lowest among people with adequate, but not excessive, dietary intakes of magnesium and niacin.

Also, see which foods are good sources of magnesium and, separately, good sources of niacin.

Coffee and Heart Disease

1/05/2021
Research published this week suggests a link between a moderate coffee consumption and reduced risk of cardiovascular disease and death. Get the details in our article about Coffee and Heart Health.

Caution With Ashwagandha

1/02/2021
Ashwagandha may decrease the effectiveness of immunosuppressant drugs and, according to a recent case report, may trigger transplant rejection. Get the details in the Concerns and Cautions section of the Ashwagandha Supplements Review. The section includes information about other potential side effects of ashwagandha.