The association between selenium intake and sleep duration Original paper

This observational study found that a higher selenium intake was associated with an optimal sleep duration.

This Study Summary was published on April 3, 2023.

Quick Summary

This observational study found that a higher selenium intake was associated with an optimal sleep duration.

What was studied?

The association between dietary selenium intake and sleep duration.

Who was studied?

17,176 participants (average age of 46) who participated in the China Health and Nutrition Survey from 2004 to 2011.

How was it studied?

In face-to-face interviews conducted in 2004, 2006, 2009, and 2011, the participants were asked how long they spent sleeping. Optimal sleep duration was defined as more than 6 ours but less than 10 hours per day. Dietary selenium consumption was assessed using a 24-hour dietary recall completed over 3 consecutive days. The analyses were adjusted for potential confounders, including age, sex, energy (calorie) intake, smoking, alcohol consumption, socioeconomic factors, physical activity, and BMI.

What were the results?

The odds of optimal sleep duration were 17% greater in the highest tertile (the top third of participants) of selenium intake (68 µg/day), compared with the lowest tertile (24 µg/day). Further analysis found an association between higher selenium intake and optimal sleep duration among the participants with overweight, but not in the participants with a BMI less than 24.

Anything else I need to know?

The Recommended Dietary Allowance (i.e., the average daily intake sufficient to meet the nutrient requirements of nearly any healthy individual) for selenium is 55 µg/day.

This Study Summary was published on April 3, 2023.