Why was this study done?

This study was done to measure overweight or obese individuals (with a BMI over 25) vitamin D levels, which are commonly low. The study wanted to find out how much vitamin D supplementation is required to bring this group up to normal levels.

What did the study find?

The study found that 5,000 IU of vitamin D3 were needed to bring obese and overweight people up to normal levels. The findings of this study agree with the Institute of Medicine and Endocrine Society recommendations in that two to three times the daily requirement of vitamin D is required to improve serum vitamin D levels in individuals who are overweight or obese.

25 (OH) D status: Effect of D3 supplement.
Authors: Lukaszuk JM, Luebbers PE. Obesity Science & Practice. 2016 Jan 1.
PubMed Citation PMID: 28392936