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woman eating a small yogurt parfait out of a clear bowl

A snapshot of the latest research on diet, exercise, and more

Weight and HealthMarch 10, 2025Bonnie Liebman, MS
woman with blanket around her shoulders blowing her nose

Can supplements ward off a cold, the flu, or Covid?

‘Immune boosting’ supplements are everywhere, but what does the evidence show about vitamins C and D, zinc, and elderberry for fighting colds, the flu, and Covid?

SupplementsFebruary 13, 2025Caitlin Dow, PhD
person looking at a vitamin bottle in a store

Do you need a multivitamin? What many people get wrong

Multivitamins may slow brain aging and slightly curb your risk of cancer, but many brands lack key vitamins or minerals or make unproven claims.

SupplementsSeptember 19, 2024Bonnie Liebman, MS
pill bottles

Are you vitamin savvy? Take our quiz.

We all need vitamins and minerals. But it’s hard to remember which are good for what, which we’re more likely—or extremely unlikely—to run short of, and how much is too much. That’s good to know, when a multi-billion dollar industry keeps trying to sell us more (and ever-pricier­) supplements.

SupplementsApril 27, 2023Bonnie Liebman, MS
News article screen capture

Peter's Memo: Cashing in on Covid

As the saying goes, “Another day, another dollar.” That’s how people shilling for shady Covid-19 cures must view the pandemic. One day it’s ivermectin, the next it’s hydroxychloroquine or colloidal silver.

COVID-19January 26, 2023Peter Lurie, MD, MPH
older man in scarf looking at thermometer

Can vitamin D prevent Covid or colds?

Does vitamin D “support immune health,” as some supplement labels claim?

COVID-19November 15, 2022
vitamin d

Vitamin D to fight COVID-19? Not so fast.

Remember hydroxychloroquine? Yes, there were anecdotes and observational studies, but, no, it flunked the gold standard for evidence, randomized controlled trials. Ditto with ivermectin. Now the man named “the most influential spreader of coronavirus misinformation online” is promoting another candidate for magic bullet: vitamin D.

COVID-19October 26, 2022Peter Lurie, MD, MPH, David Schardt
Woman pouring supplements into her hand from bottle

Does taking extra vitamin D prevent bone fractures?

Scientists randomly assigned 25,871 women aged 55 or older and men aged 50 or older to take a placebo or vitamin D (2,000 IU) every day.

Preventing DiseaseSeptember 22, 2022
woman reading news

Can you trust online health advice?

“10 ways to boost your metabolism.” “9 foods that lift your mood.” ”15 supplements to boost your immune system.” People love lists. So do websites eager to grab eyeballs. Only one problem: Much of the advice isn’t based on solid science. Here are some examples.

Fact vs. FictionMay 25, 2022Bonnie Liebman, MS
autoimmune diseases diagram

Does vitamin D or fish oil affect the risk of autoimmune diseases?

When you have an autoimmune disease, your immune system mistakenly attacks your own organs, tissues, and cells.

Preventing DiseaseMay 3, 2022Bonnie Liebman, MS
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      • Avoid Food Poisoning
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