The Association between Sleep Duration and 25-Hydroxyvitamin D Concentration with Obesity in an Elderly Korean Population: A Cross-Sectional Study.
Nutrients. 2018 May 8;10(5). pii: E575. doi: 10.3390/nu10050575.
Doo M. Dept of Food and Nutrition, Kunsan National University, Daehak-ro 558, Kunsan, Jeonbuk 54150, Korea. miae_doo at kunsan.ac.kr.
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Overview Obesity and Vitamin D contains the following summary
- FACT: People who are obese have less vitamin D in their blood
- FACT: Obese need a higher dose of vitamin D to get to the same level of vit D
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- FACT: Less weight gain by senior women with > 30 ng of vitamin D
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- SUGGESTION: Probably need more than 4,000 IU to lose weight if very low on vitamin D due to
risk factors such as overweight, age, dark skin, live far from equator,shut-in, etc.
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- Normal weight Obese (50 ng = 125 nanomole)
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Many nice features if > 20 ng of vitamin D
Studies have recently reported an association between sleep duration and obesity in some individuals. Vitamin D deficiency is common in elderly populations and is also associated with obesity. In this study, the combined interaction effect of vitamin D levels and sleep duration on obesity-related variables was analyzed in 3757 individuals from an elderly Korean population using the Korean National Health and Nutrition Examination Survey. Significant differences were observed in the interaction effect of the vitamin D levels and sleep duration on obesity-related variables, including BMI (p = 0.004) and the risk of obesity (p < 0.001).
Using vitamin D sufficient status and proper sleep duration as a reference, subjects with sufficient vitamin D did not differ in their risk of obesity regardless of their sleep duration.
However, the risk of obesity tended to increase with short sleep duration rather than proper sleep duration among subjects who were vitamin D insufficient odds ratio (OR) (95% CI) = 1.293 (1.10⁻1.657) for proper sleep duration vs. 1.374 (1.066⁻1.770) for short sleep duration).
Only the participants in the vitamin D deficient population who consumed less protein showed an increasing trend in the risk of obesity according to the sleep duration (OR (95% CI) = 1.645 (1.155⁻2.344) for proper sleep duration and 1.668 (1.156⁻2.406) for short sleep duration).
PMID: 29738471 DOI: 10.3390/nu10050575
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