Advertisements, possibly professional articles, interviews with nutritionists – this is just a narrow cut from the wide front, which focuses on suggestive suggestions of various vitamins, minerals and other substances contained in one or another dietary supplement. They promise that if we regularly swallow this or that, we will be healthier and live in the satisfaction of the elderly.
It is said that there is no such thing in the world that there is no truth in it. How true is the claim about the benefits of dietary supplements? According to the latest in-depth study by Erin Donelly Michos of Johns Hopkins University of Medicine, this is just a pinch of Annals of Internal Medicine.
Michos and her colleagues have been checked 24 different interventions in the composition of the diet caught in the results 277 clinical trials and evaluate the consequent effect of the use of dietary supplements on cardiovascular diseases a life expectancy. In total, scientists have had data on nearly a million people from around the world.
The researchers evaluated the effects of dietary supplements containing antioxidants, beta-carotene, complex vitamins B, separately used vitamins B3 or B6, selenium, vitamin A, vitamin C, vitamin E, vitamin D, calcium, calcium in combination with vitamin D, folic acid acid, iron and omega-3 polyunsaturated fatty acids, including the use of their main source of fish oil.
The diet evaluated the Mediterranean diet, reduced the intake of saturated fats (diet with reduced intake of fats in meat and milk), diet replacing saturated fats with unsaturated fats or sugars, diet with a complete reduction in fat intake, decreased salt intake in healthy people and humans. high blood pressure, dieting with increased intake of various unsaturated fatty acids in nuts, seeds and vegetable oils.
The effects of dietary supplements and nutrition were not convincing. If healthy people have reduced salt intake, reduces the risk of cardiovascular disease. t 10%. For people with hypertension but a dietary salt diet reduces the risk of cardiovascular disease. t third time.
Diet s addition folic acid reduces the risk of cardiovascular disease fifth, but this positive effect was particularly evident in Chinese patients with chronic folic acid deficiency. Western women did not improve their dietary supplements for folic acid.
Unsaturated fatty acids health of the heart and circulation minimal positive effect. Other dietary supplements and diet did not have cardiovascular disease and life expectancy without influence. Conversely, the use of calcium in combination with vitamin D slightly increased the risk of stroke.
"People need to focus on getting the necessary ingredients from a healthy diet, as there is growing evidence that most healthy people do not even need nutritional supplements," Erin Donnelly Michos summed up the results of this "inventory".
The extent of the use of dietary supplements is not negligible. In the United States, at least one vitamin or other dietary supplement takes half of the adult population each day. The total turnover in the market for food supplements reaches there annually 31 billion dollars.
Source: Annals of Internal Medicine