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Vitamin D3 May Lower Body Fat

A new randomized clinical trial has given some more weight (pun intented) to vitamin D3 supplementation. A daily dose of 1000 IU (25 mcg) was associated with a significant reduction in body fat mass, compared with placebo.

The researchers studied 77 overweight and obese women with an average age of 38 and randomly assigned them to receive either the daily vitamin D3 supplements or placebo for 12 weeks.

The researchers said that although vitamin D3 supplementation significantly increased 25(OH)D concentrations (a blood measure of vitamin D status), some participants in the vitamin D group did not reach sufficient 25(OH)D concentrations they wrote. They suggested that this may indicate 1000 IU is sub-par, and it may need higher doses or a longer period of time to see better blood levels.

In addition to fat mass reductions, data also showed that HDL cholesterol (good cholesterol) levels increased in the vitamin D group, but decreased in the placebo group. Interestingly, LDL-cholesterol (bad cholesterol) levels displayed the same trend in the groups--increasing in the vitamin D3 group.

However, this increase in LDL was shown to be the type of LDL that is less susceptible to forming arterial plaque (yes, there are many sub-types, so not all LDL is the same).

Source: Vitamin D3 and the risk of CVD in overweight and obese women: a randomised controlled trial

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  1. it's quite a statement but then again, it's only one study.
    I can see the study being used in advertisements for D3. I'm sure it can have a big impact.

  2. Why did you use " May Lower" in the title? will vitamin d3 work in reducing fat or not? Thanks !@Lisa Women Health

    1. Good question, Lisa...and I don't have a good answer. Perhaps I'll spend more time contemplating the title of each post in the future.

      However, regarding your second question, according to the study's results, it would seem like vitamin D would work to reduce fat.

      Just keep in mind that this is only one study, and while positive, needs to be confirmed by other studies to ensure these results weren't a random occurrence (perhaps this would also be an ad hoc answer to why I used "may lower").


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