According to results published in the June, 2009 issue of the
American Journal of Clinical Nutrition, taking a daily multivitamin may help women live longer by preventing parts of their DNA from shortening.
The aging and lifespan of normal, healthy cells are linked to the
shortening of telomeres, which are the end portion of
chromosomes. These telomeres protect the ends of chromosomes and
buffer them against the loss of important genes during cell
replication. Shortening of telomeres is related to the cellular dying
of the organism, and longer length is understood to be the key to
health and longevity. In other words, longer telomeres are better than
shorter ones. Telomeres shorten slightly when cells divide, and
researchers speculate that preventing this shortening could protect new
cells and therefore reduce the effects of aging.
Dr. Honglei
Chen at the U.S. National Institute of Environmental Health Sciences
analyzed multivitamin use and nutrient intakes, as well as telomere
length of 586 women between the ages of 35 and 74. As part of the
study, a 146-item food-frequency questionnaire was used to determine
multivitamin use and nutrient intakes. The researchers noted that the
telomeres were, on average, over 5 percent longer for daily
multivitamin users, than they were for non-multivitamin users. This was
the first time an epidemiological study of multivitamin use and
telomere length was ever done. Dr. Chen and his co-workers noted that
"telomere length may be a marker of biological aging, and that
multivitamins may beneficially affect telomere length via modulation of
oxidative stress and chronic inflammation."
In humans it has
been shown that telomere length can be improved through lifestyle
changes such as exercise, proper diet and stress reduction. There is
enough medical research indicating that the average American diet is
deficient in vitamins, minerals and other nutrients and that 10 to 15
percent of Americans do not get the minimum amounts of these vitamins
and minerals.
Several years ago, the
Journal of the American Medical Association
published a study detailing the status of nutrition in America. It
stated that most people do not consume an optimal amount of vitamins
through diet alone, and it was strongly recommended that everybody take
vitamin supplements. Most of the food we consume contains barely half
of the vitamins and minerals it did fifty years ago. In light of this
recent research, there is increasing evidence that a good multivitamin
may have a significant effect on health and longevity.