The study showed intake of excessive intake of some nutrients poses health risks such as cancer or CVD.
The intake of multivitamin supplements in older adults is tremendous in the US, valuing it at US$ 12 billion per year. Health supplements such as vitamin D or calcium do not help in prolonging life expectancy, rather they may increase the risk of cancer. To study this, scientists used data from the National Health and Nutrition Examination Survey from 1999-2010. The data was related to mortality rate and National Death Index which contained samples of 30,899 US adults above age 20 years.
The study believes nutrients gained through a healthy diet can increase the life expectancy reduce the risk of premature death. On the contrary, nutrients gained through additional supplements offer no such benefits. The study showed that certain supplements posed health risks, namely excessive calcium raised the cancer risk. Furthermore, it was found that Calcium intake exceeded 1000 mg per day. The study recorded 3613 deaths in which 945 deaths were due to cardiovascular disease, 805 deaths were due to cancer. It followed the 24-hour diet and the food intake was closely monitored.
When the scientists compared the nutrient intake through food and supplements, they found there was lower mortality risk if there is adequate intake vitamin K and magnesium through food instead of supplements. It also showed a low risk of cardiovascular disease, cancer, etc. It was clear that the natural intake of these nutrients has made a positive impact on human health whereas nutrients through supplements have increased the risk of various diseases. Some limitations affected the study per se duration of dietary supplement, the dosage of supplement, the prevalence of the supplement, etc. However, the study does give us an idea about how these supplements make no significant impact on our health.
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