The researchers found that adequate intakes of vitamin K and magnesium were associated with a lower risk of death, while adequate intakes of vitamin A, vitamin K, and zinc were associated with a lower risk of death from CVD.
Limitations in the study were acknowledged, which included the duration of dietary supplement use studied, as well as the fact that the prevalence and dosage of supplements were self-reported, leaving the study open to recall bias.
A new Tufts University study involving more than 27,000 Americans is the latest research to show that most supplements may not do much to improve health - or at least can't compete with the benefits of a healthy diet.
When the team accounted for the nutrient source, they discovered that the reduced risk for death and death from cardiovascular diseases were only associated with nutrient intake from food, not supplements. About 945 cardiovascular deaths and 805 cancer deaths were included.
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"This study also confirms the importance of identifying the nutrient source when evaluating mortality outcomes". Those that mentioned that they had used dietary supplements had been requested for particulars, together with how typically they took the merchandise. People with no vitamin D deficiency also faced an increased death risk when they consumed the nutrient in a supplement. Intriguingly, complement customers had been extra seemingly than others to have increased ranges of training and household earnings, eat a nutritious diet and be bodily lively. Excess consumption of calcium was associated with a higher risk of death from cancer.Food sources of vitamin K include leafy greens such as kale, spinach and broccoli rabe.
While getting the right nutrients in the right quantities from food was associated with a longer life, the same wasn't true for nutrients from supplements, says study co-author Fang Fang Zhang, an associate professor of epidemiology at the Tufts University Friedman School of Nutrition Science and Policy. While it is comforting to know that as a society we are taking a more proactive approach to our health, scientists say we may be going about it the wrong way. Instead, researchers recommend getting nutrients from food. Those who said they had used supplements were asked for details, including how often they took the products.
As for the finding that high levels of calcium might shorten life, Kumar advises people to get as much calcium from their diet as possible. "More and more evidence suggests no benefits, so we should go with what the dietary recommendations suggest to achieve adequate nutrition from food, rather than relying on supplements".
'However, in general terms, those otherwise healthy may do better overall to concentrate on consuming a healthy diet rich in vegetables, nuts, seeds, whole grain and fruit than to spend money on supplements.