The case for a breakfast feast: "Having the largest meal in the morning appears to have advantages for weight control compared with having a large meal in the evening, she said, since the digestive process and the action of insulin, the pancreatic hormone that the body uses to process the sugars in carbohydrates and store glucose, appear to be at their peak performance early in the day. As a result, “our body can use the nutrients as a source of energy the easiest,” Kahleova said.
A person eating identical meals at different times of the day might deposit more fat after an evening meal than a morning meal, she said.
That’s because insulin action is more efficient in the morning, experts say. “If you give a healthy individual a big bolus of glucose in the morning, the blood glucose might stay high one or two hours before coming back to normal,” said Dr. Satchidananda Panda, a professor at the Salk Institute for Biological Studies in San Diego. “You take that same normal healthy individual and give them the same bolus of glucose late at night, and now the pancreas is sleeping — literally — and cannot produce enough insulin, and blood glucose will stay high up to three hours.” Doctors once called this “evening diabetes,” he said."
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