Is The Time I Eat Really Important?

Watching when you eat, without necessarily changing what or how much, may yield big health benefits, including weight loss.

Although more research is needed, intriguing new findings in people and mice suggest that eating within a strict 8- to 12-hour time frame each day changes metabolism at the genetic level, lowering blood sugar and body weight, even without cutting calories.

Scientists think the changes may be powerful enough to lower the risks for cancer, heart disease, dementia, and diabetes.

The latest study on this phenomenon, called time-restricted eating, looked at the link between meal timing and blood sugar control in more than 2,200 women. The average age of women in the study was 47, and the average body mass index (BMI) was 28, making them overweight, but not Obese.

Poor blood sugar control is a risk factor for diabetes and cancer, among other things. Blood sugar that swings wildly before and after eating indicates that the body isn’t very sensitive to insulin, the hormone that signals cells to take in calories from food. That means more insulin has to be released from the pancreas to get the blood sugar into cells. The trouble is that extra insulin doesn’t just impact blood sugar. It also promotes the growth of cells -- including cancer cells. And over time, the body can’t keep up with the demand for more and more insulin. When that happens, blood sugar levels climb dangerously high, leading to diabetes.

The women in the study reported what and when they ate and gave blood samples. Researchers could see how high their blood sugar climbed after meals and how steady their blood sugar had stayed over the previous 2 to 3 months. About half the women reported not eating or drinking anything for at least 12 hours, from 6 p.m. to 6 a.m., for example. The other half fasted for less than 12 hours, eating both early and late.

“What we found, in general, [is] that women who fasted for longer nightly intervals had better blood sugar control than those who didn’t fast as long, and that was independent of other eating behaviors such as how many calories women were eating,” says study researcher Catherine Marinac, a doctoral candidate in public health at the University of California at San Diego.

It's a very interesting study of eating behavior and not calories. The whole idea of fasting everyday for 12 hours and not really watching your diet is very interesting. I'd like to see more research done on this. Maybe this is really the way to lose weight.

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