Vitamins and supplements, science highlights their effectiveness – Chatborgne

They were drawn to the lure of multivitamins and nutritional supplements to fill the nutritional gaps in their diets by 2021. Americans will spend nearly 50 billion dollars (nearly 48 billion euros) Vitamins and supplements.

However, scientists say that for healthy people who are not pregnant, vitamins are losing money Because there is not enough evidence that they help prevent cardiovascular disease or cancer. The new guidelines state that there is insufficient evidence to support the use of multivitamins or nutritional supplements to prevent cardiovascular disease or cancer in healthy adults.

In an editorial published in the journal “JAMA”, researchers from Northwestern University in the United States said that only pregnant women and those who will become pregnant still need essential vitamins (iron and folic acid).

“Patients ask all the time what supplements they should take. — According to Jeffrey Linder, MD, chief of general internal medicine in the department of medicine at Northwestern University’s Feinberg School of Medicine. They waste money and focus on the idea that there must be a magic pill to stay healthy, when we should all follow evidence-based practices of healthy eating and exercise.

Linder and other Northwestern medical scientists wrote a “JAMA” editorial in support of new recommendations from the United States Preventive Services Task Force (USPSTF), an independent panel of national experts that typically makes evidence-based recommendations for clinical prevention services.

lack of evidence

Based on a systematic review of 84 studies, the new USPSTF guidelines indicate this. There is not enough evidence Taking a multivitamin, combination supplement, or individual supplement may be Helps prevent cardiovascular disease and heart disease. cancer in adults Otherwise healthy and not pregnant.

“The task force isn’t saying you shouldn’t take a multivitamin, but the idea is that if it’s really good for you, you’ll know it now,” Linder says.

The task force specifically advises against taking beta-carotene supplements because of the potential for increased risk of lung cancer, and taking vitamin E supplements because they have no apparent benefit in terms of reducing mortality, cardiovascular disease or cancer.

“The unfortunate thing is that by talking to patients about supplements in the short time we see them, we’re missing out on advice on how to reduce cardiovascular risk, for example, Exercise or stop smoking.Linder realizes this.

Consumption on the rise

Linder and colleagues write in the editorial that more than half of American adults take dietary supplements, and their use is expected to increase.

They noted that fruit and vegetable consumption is associated with a lower risk of cardiovascular disease and cancer. So it makes sense that essential vitamins and minerals can be extracted from fruits and vegetables, and packaged in pill form, saving people the hassle and expense of maintaining a balanced diet.

But, they explained, whole fruits and vegetables contain a mix of vitamins, phytochemicals, fiber and other nutrients that likely work synergistically to provide health benefits. Location Isolated micronutrients may work differently. In the body only when naturally combined with other components of the diet.

Ms Linder points out that people who are deficient in vitamins can still benefit from taking supplements, such as calcium and vitamin D, which have been shown to prevent fractures and possibly falls in older adults.

Exception for pregnant women

New USPSTF Guidelines Do not apply to women who are pregnant or trying to conceive, She points to “JAMA” editorial co-author Dr. Natalie Cameron, professor of general internal medicine at Feinberg.

Pregnant women should be aware that these guidelines do not apply to them,” says Cameron, who is also a physician at Northwestern Medicine. Some vitamins, such as folic acid, are necessary for pregnant women to aid in the healthy development of the fetus.

He explains, “The most common way to meet these needs is by taking a prenatal vitamin. More data is needed to understand how taking certain vitamins may alter the risk of adverse pregnancy outcomes and cardiovascular complications during pregnancy,” he notes.

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