The food you eat may affect your level of sleepiness or alertness during the day, according to a new, small study.

Researchers assessed the daytime sleepiness/alertness levels of 31 healthy, non-obese people, aged 18 to 65, who were normal sleepers. Then they looked at the meals they ate.

Higher fat consumption was associated with increased daytime sleepiness while higher carbohydrate intake was linked with increased alertness. There was no relationship between protein consumption and sleepiness or alertness.

The findings were independent of the participants' age, gender, body-mass index, total amount of sleep and total intake of calories, according to the study, scheduled for presentation in June at the Associated Professional Sleep Societies annual meeting in Baltimore.

"Increased fat consumption has an acute adverse effect on alertness of otherwise healthy, non-obese adults," principal investigator Dr. Alexandros Vgontzas, a professor of psychiatry at the Penn State College of Medicine, said in an American Academy of Sleep Medicine news release.

The findings add to previous research linking diet and sleepiness.

"Excessive daytime sleepiness and fatigue are very prevalent in the modern world and on the rise," Vgontzas said. "It appears that a diet high in fat decreases alertness acutely, and this may have an impact on an individual's ability to function and also public safety."

High-fat diets are also associated with increased risk for certain cancers and heart disease.

Researchers report that men who consumed more of them did...

Researchers report that men who consumed more of them did worse on word recall test Credit: HealthDay

Data and conclusions presented at meetings are typically considered preliminary until published in a peer-reviewed medical journal.

More information

The MedlinePlus Medical Encyclopedia has more about daytime drowsiness.

On the latest episode of "Sarra Sounds Off," we look at East Islip baseball's inspirational comeback story, Jared Valluzzi has the plays of the week and Tess Ferguson breaks down the top defensive players in girls lacrosse. 

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Sarra Sounds Off Ep. 35: EI baseball, girls lacrosse and plays of the week On the latest episode of "Sarra Sounds Off," we look at East Islip baseball's inspirational comeback story, Jared Valluzzi has the plays of the week and Tess Ferguson breaks down the top defensive players in girls lacrosse.

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