Vitamin D levels in the body at the start of a low-calorie diet predict weight loss success, a new study found. The results, which suggest a possible role for vitamin D in weight loss, were presented at The Endocrine Society’s 91st Annual Meeting in Washington, D.C.

“Vitamin D deficiency is associated with obesity, but it is not clear if inadequate vitamin D causes obesity or the other way around,” said the study’s lead author, Shalamar Sibley, MD, MPH, an assistant professor of medicine at the University of Minnesota.

In this study, the authors attempted to determine whether baseline vitamin D levels before calorie restriction affect subsequent weight loss. They measured circulating blood levels of vitamin D in 38 overweight men and women before and after the subjects followed a diet plan for 11 weeks consisting of 750 calories a day fewer than their estimated total needs. Subjects also had their fat distribution measured with DXA (bone densitometry) scans.

On average, subjects had vitamin D levels that many experts would consider to be in the insufficient range, according to Sibley. However, the authors found that baseline, or pre-diet, vitamin D levels predicted weight loss in a linear relationship. For every increase of 1 ng/mL in level of 25-hydroxycholecalciferol – the precursor form of vitamin D and a commonly used indicator of vitamin D status – subjects ended up losing almost a half pound (0.196 kg) more on their calorie-restricted diet. For each 1-ng/mL increase in the active or “hormonal” form of vitamin D (1,25-dihydroxycholecalciferol), subjects lost nearly one-quarter pound (0.107 kg) more.

Additionally, higher baseline vitamin D levels (both the precursor and active forms) predicted greater loss of abdominal fat.

“Our results suggest the possibility that the addition of vitamin D to a reduced-calorie diet will lead to better weight loss,” Sibley said.

She cautioned, however, that more research is needed. “Our findings,” she said, “need to be followed up by the right kind of controlled clinical trial to determine if there is a role for vitamin D supplementation in helping people lose weight when they attempt to cut back on what they eat.”

The National Institutes of Health, the University of Minnesota, and the Pennock Family Endowment at the University of Minnesota funded this study.

Source:
Aaron Lohr
The Endocrine Society


Vitamin D

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For other uses, see Vitamin D (disambiguation).



Calcium regulation in the human body.[1] The role of vitamin D is shown in orange.

Vitamin D is a group of fat-soluble secosteroids, the two major physiologically relevant forms of which are vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). Vitamin D without a subscript refers to either D2 or D3 or both. Vitamin D3 is produced in the skin of vertebrates after exposure to ultraviolet B light from the sun or artificial sources, and occurs naturally in a small range of foods. In some countries, staple foods such as milk, flour and margarine are artificially fortified with vitamin D, and it is also available as a supplement in pill form.[2] Food sources such as fatty fish, mushrooms, eggs, and meat are rich in vitamin D and are often recommended for consumption to those suffering vitamin D deficiency.[3]

… Vitamin D insufficiency can result in thin, brittle, or misshapen bones, while sufficiency prevents rickets in children and osteomalacia in adults, and, together with calcium, helps to protect older adults from osteoporosis. Vitamin D also modulates neuromuscular function, reduces inflammation, and influences the action of many genes that regulate the proliferation, differentiation and apoptosis of cells.[5]

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Products I suggest to help you to stay within sufficient range instead of taking mega doses for a few weeks then fall deficient again. This is especially true for those of you that do not live in areas where you are able to expose your skin to sufficient sun on a regular bases.

Several AdvoCare products are excellent sources of vitamin D. AdvoCare products that contain vitamin D include CorePlex® and CorePlex® with Iron tablets (600 IU vitamin D per serving), CorePlex® Chewable tablets (400 IU vitamin D per serving), Calcium Plus tablets (200 IU per four tablets), V16® Energy Drink (200 IU per pouch), Meal Replacement Bar (200 IU per bar) and Double Chocolate Snack Bar (200 IU per bar).

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