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CL Answers (18)

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Clinical Updates (12)

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3/18/2022

Iodine Pills for Radiation Protection

Due to concerns relating to the safety of nuclear reactors and potential use of nuclear weapons in the war in Ukraine, demand for radioprotective iodine products has jumped.

Potassium iodide and potassium iodate can help protect the thyroid from the effects of radioactive iodine from the air, water, and foods after a nuclear event. But who should be taking these products, when should they be taken, and how much should be taken?

Find out in our review of Potassium Iodide and Iodate Radioprotective Pills, and see our Top Picks among products (and where to currently get them).

5/30/2020

Cranberry for Cystitis in Men?

Cystitis (inflammation of the bladder) is common in men undergoing radiation therapy for prostate cancer. A study evaluated whether a cranberry supplement could reduce the incidence of cystitis in these men. Find out if it helped in our updated answer to the question: Are cranberry supplements helpful for men? Can they help with symptoms of prostatitis or urinary tract infections?
11/17/2014

Keep Energy Drinks Away from Kids

It was reported this week that 40% of calls to poison centers for "energy drink exposure" involved children under age 6, many of whom experienced serious side effects. For more about this and other concerns with energy drinks, as well as our test results for popular products, see the B Vitamins & Energy Drinks Review >> 
2/29/2020

How Much Sun for Vitamin D?

Is sun exposure to the hands, arms, and legs enough to boost or maintain adequate vitamin D levels? See what a recent study showed in the Getting Vitamin D from Sunlight section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
8/24/2021

Air Cleaners for Wildfire Smoke

Find out which types of portable air cleaners are best for wildfire smoke. Also see our top picks among air cleaners (including for use in reducing viral exposure).
12/30/2021

New Recommendations for Quarantine and Isolation

The CDC has shortened its recommended time for isolation after confirmed infection as well as quarantine after exposure. Get the details, plus find out if people should be retested before ending isolation.
3/23/2021

How Much Sun to Boost Vitamin D?

Find out how much sun exposure was needed in a recent study to significantly increase vitamin D levels in older people in the Getting Vitamin D from Sunlight section of our Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.
6/12/2021

Vitamin D and Melanoma

Can vitamin D supplementation improve outcomes in people with melanoma skin cancer? See what a new study found in the What It Does section of the Vitamin D Supplements Review.

Also see our answer to the question: Do any supplements or foods help prevent sunburn or skin damage from sun exposure? Can any increase your risk of sun-related skin damage?
7/28/2020

How Much Vitamin D from Sunshine?

Does exposure to midday sun increase already sufficient vitamin D blood levels? Get the surprising answer from a new study in the Getting vitamin D from sunlight section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.
4/19/2022

CPAP Humidifiers & PFAS?

Can using a CPAP humidifier increase one's exposure to potentially dangerous PFAS? Find out in our updated answer about Avoiding PFAS.

6/22/2011

Does Taking Vitamin D Reduce the Risk of Heart Disease?

Earlier research has suggested an association between higher vitamin D levels in the blood and reduced risk of heart attack. But blood levels are affected by both sun exposure as well as intake of vitamin D. A new study shows that men with higher vitamin D intakes from foods and supplements have a 14% reduction in their risk of cardiovascular disease and stroke. However, the study found no reduction among women. The amount of vitamin D intake shown to be beneficial and possible reasons why a benefit was not found in women are provided in the updated "What It Does" section of our Product Review of Vitamin D SupplementsMore >>

Recalls & Warnings (23)

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