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CL Answers (22)

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Recalls & Warnings (60)

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Clinical Updates (8)

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11/22/2020

Vitamin D & Cancer Prevention

Taking vitamin D may modestly reduce the risk of advanced cancer in some people, according to a recent study. Learn the details in the What It Does section of our Vitamin D Supplements Review. Also, see our Top Picks for vitamin D.
3/19/2021

Melatonin and Cancer

Can high-dose melatonin increase survival time or improve symptoms in people with advanced lung cancer? See what a new study found in the What It Does section of our Melatonin Supplements Review.

Also see results of a study in which melatonin was given during breast cancer treatment.

See our Top Picks among melatonin supplements.
5/03/2014

Vitamin D Deficiency May Predict Advanced Prostate Cancer

According to a new study, prostate biopsies in men who are deficient in vitamin D are more likely to show a higher grade and stage of cancer than biopsies in men with higher levels of vitamin D. For more details, as well as our tests of vitamin D supplements, see the Vitamin D Supplements Review >> 
3/05/2016

Vitamin D and Prostate Cancer

A recent study looked at the association between vitamin D blood levels and the risk of advanced prostate cancer. Based on the findings from this and related studies, there seems to be a reasonable approach with vitamin D to potentially lower prostate cancer risk. Get the details (as well as our tests of products) in the Vitamin D Supplements Review >>
12/02/2018

Carnitine Heart Risk?

Supplementing with L-carnitine can raise blood levels of TMAO which can potentially advance atherosclerosis. However, the science is not clear, as suggested by a recent study. Get the details in the L-Carnitine section of the Acetyl-L-Carnitine Supplements Review.
8/08/2014

Up To a Point, Alzheimer's Risk Falls with Vitamin D

A new study shows that, up to a point, the risks of developing Alzheimer's disease and other forms of dementia fall with higher blood levels of vitamin D. However, the research also clarifies that exceeding a certain blood level of vitamin D provides no further benefit. In fact, additional research suggests that too much vitamin D can have negative effects. The message: Make sure you have a sufficient, but not excessive level of vitamin D. For details about these levels, as well as results of our tests of vitamin D supplements, see the updated Vitamin D Supplements Review >> 
8/03/2021

Ivermectin

Find out why ivermectin is generally not recommended for COVID-19 outside of clinical trials, despite some research suggesting a benefit.

News Releases (34)

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