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(Vitamin D occurs naturally in fatty fish such as salmon and tuna, beef liver, cheese, and egg yolks.It’s also found in fortified foods such as milk, orange juice, and cereal.) “You are at risk of D deficiency only if you have no sun exposure, live above 55 degrees latitude, and do not eat vitamin D-fortified paper.
“There really is no health boost for vitamin D supplementation,” Clifford J.
Rosen of the Maine Medical Center Research Institute in Scarborough, told Vox.
However, the results of many of these studies are either preliminary or under debate.
Without other long-term research, even many of the researchers who conducted these initial studies are cautious about recommending vitamin D for the prevention of these diseases.
In 2010, the Institute of Medicine (now known as the National Academy of Medicine) brought together an expert committee to review the evidence on the vitamin and figure out whether there was a widespread deficiency problem in North America.
According to the 14-member panel, 97.5 percent of the population got an adequate amount of vitamin D from diet and the sun.And early observational research on the benefits of vitamin D uncovered associations between higher levels of vitamin D intake and a range of health benefits. More recent randomized trials — that introduce vitamin D to one group and compare that group with a control group — have shown little or unclear benefit for both vitamin D testing and supplementation in the general population.But the studies could only tell about correlations between vitamin D exposure and disease outcomes, not whether one caused the other. And reviews that take these trials together to come to more fully supported conclusions, like the paper, are similarly lackluster.But in most people with no symptoms of deficiency, the tablet shows such little utility that doctors are even questioning why we bother to measure vitamin D levels in those who aren’t at risk.Most of us actually get enough vitamin D without even trying.Of course, there are some cases when supplementation can be helpful: During pregnancy, for example, or for people who have been diagnosed with health conditions that may lead to vitamin deficiencies, like liver disease or multiple sclerosis.People with asthma, those who don’t get into the sun at all (like the homebound or institutionalized), or those from ethnic backgrounds with darker skin — African, Afro-Caribbean, and South Asian — may also benefit from a supplement.“Maybe people will stop taking vitamin D supplements, but somehow I doubt it.Vitamin D may also play a role in muscle function and the immune system.The hype about the vitamin during the past two decades started with early vitamin D science.Before researchers run randomized controlled trials, they often look for links between health outcomes and exposures in large-scale population research called observational studies. 1 thing you need more of.” And the vitamin D industry helped create a craze by paying prominent doctors to expound on the benefits of testing and supplementation for everyone.