Successful weight loss with dieting is linked to vitamin D levels

Jun 11, 2009

Vitamin D levels in the body at the start of a low-calorie diet predict weight loss success, a new study found.

" 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 ," 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."

Source: The Endocrine Society (news : web)

Explore further: Mobile tracking application may help users meet vitamin D requirements

Related Stories

'Let the sunshine in' to protect your heart this winter

Nov 17, 2008

The temperature might not be the only thing plummeting this winter. Many people also will experience a decrease in their vitamin D levels, which can play a role in heart disease, according to a new review article in Circulation.

Vitamin D tied to muscle power in adolescent girls

Feb 03, 2009

Vitamin D is significantly associated with muscle power and force in adolescent girls, according to a new study accepted for publication in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism (JCEM).

Recommended for you

Using a shopping list may aid food desert residents

3 hours ago

For residents of areas with limited access to healthy foods, also known as food deserts, multiple barriers exist that amplify the health risks of living in those areas. Likewise, risks for poor diet and being overweight or ...

Perception of US care for the dying worsens

10 hours ago

Surveys of loved ones who lost elderly relatives show that the perception of the quality of care for the dying in the United States has worsened over the last decade. For all the health care industry has done to try to make ...

Expanded hospice improves care but raises Medicare costs

10 hours ago

A large new study in the New England Journal of Medicine examines the impact of growth in Medicare's hospice benefit among nursing home residents between 2004 and 2009. The researchers documented improvement in ind ...

Ivory Coast bans skin whitening creams

10 hours ago

Ivory Coast has banned skin whitening creams, which are widely used in west Africa, because of fears they cause lasting damage to health, the health ministry said Wednesday.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

dan42day
2.5 / 5 (2) Jun 12, 2009
It has been supposed that humans became lighter skinned as they moved north to allow more efficient vitamin D production in the decreased sunlight.

Other adaptations to the colder environment may include increased fat production and hoarding both for insulation and to provide reserves for the food shortages of winter.

It could make sense that lower levels of vitamin D, due to decreased sunlight would provide a signal to increase fat storage.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.