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| 2023-09-17 12:34:57 | onclick： | Vitamins and dietary supplements are "waste of nutrients." |
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Diet and exercise are the key without the magic pill
Attracted by multivitamins and dietary supplements, Americans will spend nearly $50 billion on vitamins and dietary supplements in 2021.But the scientists say taking vitamins is a waste of time for healthy people who are not pregnant because "there is not enough evidence" that vitamins help prevent cardiovascular disease or cancer.
The patient keeps asking, 'What supplements should I take?"They think there must be magic pills to keep themselves healthy, but in reality, we should all follow evidence-based, healthy diets and exercise," said Jeffrey Linder, director of medicine at Northwestern University's Feinberg School of Medicine.”
On June 21, Linder and other scientists at Northwestern University School of Medicine wrote an editorial in support of the new recommendations of the USPSTF, published in the Journal of the American Medical Association.
USPSTF is an independent panel of experts who regularly make evidence-based recommendations on clinical prevention services.Based on a systematic review of 84 studies, the new USPSTF guidelines note that "there is insufficient evidence" that taking multivitamins, paired supplements, or single supplements can help healthy, unpregnant adults prevent cardiovascular disease and cancer.
USPSTF specifically recommends against beta-carotene supplements, which may increase the risk of lung cancer, and vitamin E supplements, which have no net benefit in reducing mortality, cardiovascular disease or cancer.
"Unfortunately, talking about supplements in situations where doctors and patients have very limited time to meet often misses advice on how to really reduce the risk of cardiovascular disease, such as by exercising or quitting smoking.”Linder说。
Linder and colleagues wrote in an editorial in the Journal of the American Medical Association that more than half of American adults take dietary supplements and expect increased use of them.
They say eating fruits and vegetables is associated with reducing cardiovascular disease and cancer risk, so there is reason to think that essential vitamins and minerals can be extracted from fruits and vegetables and packaged in pills.
But scientists explain that fruits and vegetables contain a mixture of vitamins, phytochemicals, fibers and other nutrients that may have synergistic effects and be good for health.The role of individual micronutrients in the body may differ from that of many other dietary components in natural combination.
People with vitamin deficiencies can still benefit from dietary supplements, such as calcium and vitamin D, which have been shown to prevent fractures and falls in older adults, Linder said.
The new USPSTF guidelines are not applicable to pregnant or attempted pregnancies."Pregnant women should remember that these guidelines do not apply to them."Some vitamins and folic acid are essential for the healthy development of the fetus, " said Natalie Cameron of Northwestern University School of Medicine, one of the editorial's co-authors.The most common way to meet these needs is to take prenatal vitamins.We also need more data to understand how specific vitamin supplements alter adverse pregnancy outcomes and risk of cardiovascular complications during pregnancy.”
In addition, a recent study by Northwestern University found that most American women had poor heart health prior to pregnancy.In addition to discussing vitamin supplements, working with patients to optimize pre-pregnancy cardiovascular health is an important part of prenatal care, Cameron said.
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