Posted on 04/25/2010 11:48:58 AM PDT by decimon
According to legend, it was The Fountain of Youth that the famed Spanish explorer Ponce de Leon was seeking when he landed on the Floridian coast in 1513. It has long been said that he who drinks from the Fountain will have his youth restored. Without a doubt, the quest for eternal youth is as ancient as any pursuit. However, although we are now living longer than ever, there is now growing concern that quantity of years is not nearly as important as quality of those years. Indeed, as we experience the many joys of living longer, we also must deal with myriad consequences accompanying this aging trend. For instance, osteoporosis, arthritis, and other serious and often painful bone and joint diseases are much more common as we get older. And, not surprisingly, seniors often struggle daily with what was once the simple task of getting around. Hence, the obvious question in today's society concerning our longevity is "What choices can we make to help ease these inconveniences of aging?"
One area of particular interest is the role that diet plays in keeping bones and muscles strong from infancy to old age. For instance, a limited number of studies point to the possibility that optimal intake of vitamin D (the "sunshine" vitamin) might help keep our muscles strong and preserve physical function. Although there are only few longitudinal studies investigating this relationship, their findings have been mixed. To help understand this diet-health association, Dr. Denise Houston from the Sticht Center on Aging at Wake Forest University and her collaborators studied the relationship between vitamin D status and physical function in a group of relatively healthy seniors living in Memphis, TN and Pittsburgh, PA. Their results will be presented on Sunday, April 25 as part of the scientific program of the American Society for Nutrition, composed of the world's leading nutrition researchers, at the Experimental Biology 2010 meeting in Anaheim.
This study was part of the Health, Aging, and Body Composition (Health ABC) study initially designed to assess the associations among body composition, long-term health conditions, and mobility in older adults. For Houston's segment of the investigation, she studied 2788 seniors (mean age: ~75 years) for 4 years. At the beginning of the study, they assessed vitamin D status by analyzing each person's blood for 25-hydroxyvitamin D, a precursor for activated vitamin D. At baseline and then 2 and 4 years later, the research team then determined whether circulating 25-hydroxyvitamin D was related to the participants' physical function. Specifically, they looked at how quickly each participant could walk a short distance (6 meters) and rise from a chair five times as well as maintain his or her balance in progressively more challenging positions. Each participant was also put through a battery of tests assessing endurance and strength.
When the results were tabulated, participants with the highest levels of 25-hydroxyvitamin D had better physical function. And, although physical function declined over the course of the study, it remained significantly higher among those with the highest vitamin D levels at the beginning of the study compared to those with the lowest vitamin D levels. The scientists were not surprised to learn that, in general, vitamin D consumption was very low in this group of otherwise healthy seniors. In fact, more than 90% of them consumed less vitamin D than currently recommended, and many were relying on dietary supplements.
The good news: higher circulating 25-hydroxyvitamin D is related to better physical function in seniors. But it's impossible to tell from this type of research whether increasing vitamin D intake will actually lead to stronger muscles and preserve physical function. This is partly due to the fact that our bodies can make vitamin D if they get enough sunlight. So, it is possible that the participants with better physical function had higher vitamin D status simply because they were able to go outside more often. Indeed, the ominous "chicken-or-the-egg" question can only be answered by carefully controlled clinical intervention trials. Nonetheless, it is possible that getting more vitamin D from foods (like fortified milk and oily fish) or supplements will help maintain youth and vitality as we enjoy longer lifespans. As Houston points out: "Current dietary recommendations are based primarily on vitamin D's effects on bone health. It is possible that higher amounts of vitamin D are needed for the preservation of muscle strength and physical function as well as other health conditions. However, clinical trials are needed to definitively determine whether increasing 25-hydroxyvitamin D concentrations through diet or supplements has an effect on these non-traditional outcomes."
Will vitamin D research lead us to The Fountain of Youth? Probably not. But paying attention to how much vitamin D we get is likely important at every age and will help enhance the "quality" component of life as we enter our senior years.
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Dr. Denise Houston (Wake Forest University, Winston Salem, NC); Dr. Janet Tooze (Wake Forest University); Rebecca Neiberg (Wake Forest University), Dr. Kyla Shea (Wake Forest University), Dr. Dorothy Hausman (University of Georgia, Athens, GA), Dr. Mary Ann Johnson (University of Georgia), Dr. Jane Cauley (University of Pittsburgh, Pittsburgh, PA), Dr. Doug Bauer (University of California, San Francisco, CA), Dr. Frances Tylavsky (University of Tennessee, Memphis, TN), Dr. Marjolein Visser (VU University, Amsterdam, Netherlands), Dr. Eleanor Simonsick (National Institute on Aging, Baltimore, MD), Dr. Tamara Harris (National Institute on Aging), and Dr. Stephen Kritchevsky (Wake Forest University) were coauthors on this paper.
Golden pond ping.
Blue Zone Diet for longevity
I have always drank mucho milk and in last 20+ years primarily skim milk mixed with Whey Protein (ON’s Vanilla Ice Cream flavor). MMM.MMMM.MMMMMMM.
Drs. are prescribing 50,000 weekly.
“You’ve gotta tell them! Soylent Green is people! We’ve gotta stop them somehow!”
Check Heston as Det. Thorn in Soylent Green
Det. Thorn: “You know, there are 20 million guys out of work in Manhattan alone just waiting for my job.”
Sounds like an Obama economy.
“Get your filthy paws off me you dirty apes”
I would urge everyone to have their vit. D levels checked. Most American’s are lacking. Low vit. D has been linked to many cancers. Breast cancer, prostrate cancer, pancreatic cancer and skin cancers just to name a few.
It’s ironic that vit. D insufficiency has been implicated in skin cancer. I think that in years to come, the American Dermatology Association is going to have much for which to apologize. Creating this panic about ‘incidental exposure’ is going to saddle us with many problems, especially once Obamacare kicks in. But I’m confident that it will be repealed and replaced.
thanks decimon
Of course, there was a recent article (posted on FR, but I don’t have the link) about a study showing high levels of Vit. D caused calcium deposits in the arteries, leading to heart disease. Who knows what to do with all the conflicting scientific studies?
For myself, I take 400 IU daily & I try to get a little sun each day (when there is any!)
And it’s not an expensive vit. Walgreen’s and Kroger normally run a buy 1 get 1 free of Nature’s Bounty or Nature’s Finest. Coupons for Nature’s Bounty are often in the Sunday paper. I take 1—1,000mg in the morning another at night. I break my coral Calcium up like that too. The D makes the Calcium work better. I have to limit my dairy products.
First they scare us with getting to much sun, to use sun screens or blocks, now they are finding out we need at least 30 mins of it a day. Of course with my Celtic ancestry fair skin, 50 block is a must.
Agreed, it is ironic. A little sunshine is far better than smearing your body with sunscreen. That’s not to say that roasting in the sun and cooking your skin like a chicken is good - just normal, healthy exposure. As in all things, moderation...
Everyone is different. I take 5000 IU a day and have trouble keeping my D level in a good range. Some people might only need 2-4000 a day. The average person needs about 4000 IU from sun and vitamins a day, that's about how much your body uses. If you stayed in the sun for 30 minutes you would average 10,000 IU. Course the farther south you are the more you get, the farther north you are, the less D you'll get. Vitamin D is actually not a vitamin it's a hormone.
One of the best places for info on D is: www.vitamindcouncil.com
I was surprised that thread didn’t gain more interest. The potential for repairing spinal cord injuries, or, I guess, any nerve damage, is amazing.
However, the nerve damage in this article was newly created so I’m left wondering about older injury.
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