HIGH-FAT DIETS LINKED TO DAYTIME SLEEPINESS
Published in Food Product Design May 14, 2013 These finding are very interesting - high fat versus high carbs versus high protein.
DARIEN, Ill.—Individuals who consume a high-fat diet may experience decreases alertness during the day, while people who eat a high-carbohydrate diet may have increased alertness, according to a new study published online in the journal SLEEP. The findings add to a growing body of research linking diet to objective sleepiness.
According to the findings, there was no relationship between protein consumption and sleepiness or alertness. The findings were independent of the subjects’ gender, age and body mass index, as well as the total amount of sleep they were getting and their total caloric intake.
“Increased fat consumption has an acute adverse effect on alertness of otherwise healthy, non-obese adults," said principal investigator Alexandros Vgontzas, M.D., professor of psychiatry at the Penn State College of Medicine.
The study group comprised 31 healthy, non-obese normal sleepers without sleep apnea, ranging in age from 18 to 65 years who spent four consecutive nights in a sleep lab. On the fourth day objective sleepiness was assessed with the Multiple Sleep Latency Test (MSLT), and meals were provided five times to assess diet.
“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."
Previous studies had found that diet composition affects subjective sleepiness. The current study adds to this body of research by showing a similar association between diet and objective sleepiness.
In 2012, a study published in the Journal of Clinical Sleep Medicine found individuals who are vitamin D deficient are more prone to daytime sleepiness compared to those who have adequate vitamin D levels.
According to the findings, there was no relationship between protein consumption and sleepiness or alertness. The findings were independent of the subjects’ gender, age and body mass index, as well as the total amount of sleep they were getting and their total caloric intake.
“Increased fat consumption has an acute adverse effect on alertness of otherwise healthy, non-obese adults," said principal investigator Alexandros Vgontzas, M.D., professor of psychiatry at the Penn State College of Medicine.
The study group comprised 31 healthy, non-obese normal sleepers without sleep apnea, ranging in age from 18 to 65 years who spent four consecutive nights in a sleep lab. On the fourth day objective sleepiness was assessed with the Multiple Sleep Latency Test (MSLT), and meals were provided five times to assess diet.
“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."
Previous studies had found that diet composition affects subjective sleepiness. The current study adds to this body of research by showing a similar association between diet and objective sleepiness.
In 2012, a study published in the Journal of Clinical Sleep Medicine found individuals who are vitamin D deficient are more prone to daytime sleepiness compared to those who have adequate vitamin D levels.
Sources:
- American Academy of Sleep Medicine: Study links diet with daytime sleepiness and alertness in healthy adults
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