Eating during the night is associated with higher risk of heart disease and diabetes, and the body’s 24-hour cycle is to blame, according to research published today in Experimental Physiology.
The researchers at the National Autonomous University of Mexico looked at levels of fat, called triglycerides, in the rats’ blood. They found that after feeding the rats fat at the beginning of their rest period, their blood fat levels spiked more drastically than when fed during the beginning of their active phase. When they removed the part of the rat’s brain that controls the 24-hour cycle, there was no longer a change in fat levels.
High blood fat levels are associated with heart disease and diabetes. These diseases are associated with a lifestyle where humans ignore the signals of the biological clock, and eat in the evening and night. This study demonstrates why such a lifestyle out of sync with our 24-hour cycle may result in high blood fat levels and thus in a higher risk for heart problems.
Commenting on the study, author Ruud Buijs said: ‘The fact that we can ignore our biological clock is important for survival; we can decide to sleep during the day when we are extremely tired or we run away from danger at night. However, doing this frequently – with shift work, jet lag, or staying up late at night – will harm our health in the long-term especially when we eat at times when we should sleep.’
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