The use of multivitamins has come in and out of favor over the years as studies supporting their health benefits have shown mixed results. Although some research has suggested that taking a daily multivitamin may be beneficial, the results have been inconsistent. Some studies have even shown an increased mortality for those who take multivitamins, particularly smokers who take supplements containing high levels of vitamin A, vitamin E, and beta-carotene. Now, a new study suggests that taking a multivitamin could slow down cellular aging. Could this be a new reason to take a multivitamin?
Do People Who Take a Multivitamin Age More Slowly?
Telomere length is an important market for cellular aging. A telomere is a portion of DNA that protects the chromosomes from damage and destruction. As cells become older, the telomeres shorten in length. This is considered to be an accurate sign of a cell that’s past its prime. Telomere length is thought to be a marker for cellular aging.
The researchers in this study showed that people who take a multivitamin every day have telomere lengths that are five percent longer than those who get their vitamins and nutrients only through diet. Although these results are interesting, it doesn’t necessarily indicate that the longer telomeres seen in multivitamin users were actually caused by taking vitamins. Generally, people who take multivitamins on a regular basis eat a healthier diet and have an overall healthier lifestyle which could also be why their cells age more slowly.
Is This a Good Reason to Take a Multivitamin?
Since it’s difficult to say whether the positive effects on cell aging were caused by use of multivitamins, it would be premature to take one based on the results of this study alone. With so many studies on multivitamins giving conflicting results and some even showing harm, the experts can’t even agree whether the average person should take a multivitamin, although certain individuals who are have medicals problems or are malnourished may benefit from one.
The Bottom Line: Is It Wise to Take a Multivitamin?
Anyone who chooses to take a multivitamin should select one that doesn’t have high levels of vitamin A, E, or added beta-carotenes. Higher levels of these vitamins in the form of supplements have been shown to increase the risk of lung cancer in smokers. Another issue is iron. Most people, with the exception of some vegetarian pre-menopausal women, get enough iron in their diet. Plus, too much iron in the diet has been associated with an increased risk of heart disease. The excess iron the body can’t use is stored in organs such as the heart, liver, and pancreas which could result in organ damage. Unless a person is known to have low irons stores, a multivitamin without iron should be taken if one is taken at all. It’s always best to consult a medical professional before starting new vitamins or nutritional supplements.
Sources:
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Am J Epidemiol. 2000 Jul 15;152(2):149-62
