US New Guide: Vitamins and dietary supplements are "waste money"!

Wen ｜ Wenlele

The new guide is not recommended to take vitamin E. Image source: Michelle Arnold/Alamy

Attracted by composite vitamins and dietary supplements, Americans spent nearly $ 50 billion in vitamin and dietary supplements in 2021. However, scientists say that taking vitamins is a waste for healthy people who are not pregnant, because "there is no sufficient evidence" shows that vitamins help prevent cardiovascular disease or cancer.

“患者一直在问，'我应该服用什么补充剂？'”西北大学范伯格医学院医学系内科主任Jeffrey Linder说，“他们认为一定有神奇的药丸能让自己保持健康，但实际上，我们They should follow the healthy diet and exercise methods of evidence. "

On June 21, a new proposal written by Linder and other scientists of Linder and Northwestern University Medical College to support the US prevention service group (USPSTF) was published in the "American Medical Association Magazine".

USPSTF is an independent expert group that often puts forward evidence -based suggestions on clinical prevention services. Based on a systematic review of 84 research, the new USPSTF guide pointed out that "there is no sufficient evidence" shows that taking composite vitamins, pairing supplements, or single supplements can help healthy, unwell adults prevent cardiovascular disease and cancer.

USPSTF is particularly recommended not to take β -carotene supplements, because it may increase the risk of lung cancer; it is not recommended to take vitamin E supplement, because it does not have net benefits in reducing mortality, cardiovascular disease or cancer.

"Unfortunately, when you talk about supplements when doctors and patients are very limited to meet, they often miss the consultation of how to truly reduce the risk of cardiovascular disease, such as exercise or smoking." Linder said.

Linder and colleagues wrote in the Society of the American Medical Association that more than half of the American adults take dietary supplements, and the use of supplements is expected to increase.

They said that eating fruits and vegetables is related to reducing cardiovascular disease and cancer risk. Therefore, there are reasons that they can extract key vitamins and minerals from fruits and vegetables, and packaged as a medicine tablet to keep a balanced dietary belt for people to save people to save a balanced diet belt Come troubles and flowers.

However, scientists explained that fruits and vegetables contain mixtures of vitamins, plant chemicals, fibers, and other nutrients. These nutrients may have synergistic effects and are beneficial to health. The role of separate trace nutrients in the body may be different from the natural combination with many other diet.

Linder pointed out that people with vitamin deficiency can still benefit from dietary supplements, such as calcium and vitamin D, which have proven to prevent fractures and falling of the elderly.

The new USPSTF guide is not applicable to those who are pregnant or trying to get pregnant. "Pregnant women should remember that these guidelines are not applicable to them." One of the apexs, one of the sources and Natalie Camen of Northwestern University Medical College, said, "Some vitamins and folic acid are essential to fetal health. It is to take prenatal vitamins. We also need more data to understand how specific vitamin supplements change the risk of bad pregnancy ending and cardiovascular complications during pregnancy. "

In addition, the recent research of Northwest University found that most American women had poor heart health before pregnancy. Cameron said that in addition to discussing supplementary vitamins, doctors and patients cooperate with patients to optimize cardiovascular health before pregnancy are an important part of prenatal care.

Related thesis information:

https://doi.org/10.1001/jama.2022.9167

"China Science News" (2022-06-23 2nd Edition International)

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