The study released online to Appetite took a look at data from the 2007-2008 U.S. National Health and Nutrition Examination Survey.
- Certain nutrients may play a role in sleep duration.
- People who eat a wide variety of foods - an indicator of an overall healthy diet - had the healthiest sleep patterns.
- Short sleepers - five to six hours a night - consumed the most calories; followed by normal sleepers - seven to eight hours; very short sleepers - fewer than five hours; and long sleepers - nine or more hours.
- Normal sleepers consumed the most varied diet; short sleepers consumed the least varied diet.
- Very short sleep was associated with lower intake of a chemical called lycopene - found in red and orange-colored foods such as tomatoes as well as total carbohydrates and tap water.
- Short sleep was associated with lower intake of vitamin C, tap water, selenium - a mineral found in nuts, meat and shellfish - and higher intake of nutrients found in green, leafy vegetables - called lutein and zeaxanthin.
- Long sleep was associated with lower intake of a substance found in chocolate and tea theobromine; a saturated fat called dodecanoic acid; choline - which is found in eggs and fatty meats; total carbohydrates; and a higher intake of alcohol.
"Although many of us inherently recognize that there is a relationship between what we eat and how we sleep, there have been very few scientific studies that have explored this connection, especially in a real-world situation," said Michael Grandner, an instructor in psychiatry and member of the Center for Sleep and Circadian Neurobiology at the University of Pennsylvania Perelman School of Medicine. "In general, we know that those who report between seven and eight hours of sleep each night are most likely to experience better overall health and well-being so we simply asked the question, 'Are there differences in the diet of those who report shorter sleep, longer sleep, or standard sleep patterns?'
"Overall, people who sleep seven to eight hours each night differ in terms of their diet, compared to people who sleep less or more," Grandner added. "We also found that short and long sleep are associated with lower food variety. What we still don't know is if people altered their diets, would they be able to change their overall sleep pattern?"
Grandner feels that this will be an important area to explore going forward because it's known that short sleep duration is associated with poor health effects, including weight gain, obesity, diabetes and cardiovascular disease. It's also known that people who sleep too long experience negative health consequences."If we can pinpoint the ideal mix of nutrients and calories to promote healthy sleep, the health care community has the potential to make a major dent in obesity and other health risk factors."
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