Do multivitamins do anything? Here’s what experts say – TODAY

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Lots of us — 86%, according to one survey — take multivitamins or supplements. And only 24% of those who take them have a documented nutritional deficiency. The rest of us, presumably, are looking for a little insurance that we’re getting the micronutrients we need.
But do these supplements make a difference? Or are we wasting our money? Manish Paranjpe, a student at Harvard Medical School in Boston, wanted to find out. He led a team of researchers who analyzed CDC data for 20,000 people. The study results were published in BMJ Open in early November 2020, and the findings suggested that the health benefits of multivitamin and mineral supplements might be all in the minds of the people who pop them every morning.
People who take them self-report that their health is “excellent” or “very good” 30% more often than those who don’t. But the data doesn’t back up their claims. The researchers compared the people who took these supplements with those who didn’t. It turned out, there were no differences in whether they:
Paranjpe’s research seems to suggest that we might be better off taking other steps to improve our health. “There are more evidence-based things people can do (instead of taking multivitamins), such as eating a healthy diet or exercising,” Paranjpe said.
It’s hard to evaluate whether multivitamin and mineral supplements make a difference, though. So many factors play into our diets that it’s hard to study the effects of individual micronutrients. It’s challenging because:
Samantha Cassetty, a registered dietitian based in New York City and the coauthor of “Sugar Shock,” told TODAY she doesn’t recommend multivitamins for most people — she focuses more on food. “You can get most of what you need from food,” she said. “But a lot of people don’t eat that well.”
Cassetty sees the expense as the main downside of multivitamins. “If you feel the cost of a multivitamin exceeds what the value should be for you, you absolutely should not be doing that,” she said. “But if the added assurance makes you feel better, I don’t see the downside.”
Vitamin D is a nutrient Cassetty singled out as a worthwhile supplement. Most people need more vitamin D, which is involved in regulating the immune system and may help prevent serious infections from COVID-19.
“I’ve been recommending vitamin D even pre-COVID,” Cassetty said. Supplementation can help because it’s tough to get enough vitamin D naturally. It’s only in a handful of foods, including some mushrooms, salmon and egg yolks. Your body can also make it from sunlight, but the time of day, weather, your clothing and your sunscreen can all affect how much sunlight — and therefore, how much vitamin D — you get.
Other supplements might be smart choices for certain groups of people:
Cassetty said some people prefer a multivitamin if they need a few different supplements, rather than taking them individually. She explained that if you want to take a multivitamin you should:
She also pointed out that a multivitamin isn’t a replacement for a healthy diet. “If you want to take a multi for added assurance, that’s OK, but don’t take it instead of working on your eating habits,” she said. “Your primary focus should be on improving your eating habits. There is much stronger evidence for eating a plant-forward, mostly whole foods diet than there is for multivitamins.”
Stephanie Thurrott is a writer who covers mental health, personal growth, wellness, family, food and personal finance, and dabbles in just about any other topic that grabs her attention. When she’s not writing, look for her out walking her dog or riding her bike in Pennsylvania’s Lehigh Valley. 
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