Question

why do we feel drousy after having heavy meal?

Answer 1

here's your answer buddy...
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This amino acid is used by the body to produce serotonin, whichis responsible for drowsiness. Moreover, foods containing carbohydrates also help produce serotonin and tryptophan amino acids found in the brain. This isthe reason why you feel sleepy after eating carbohydrate-rich foods.

Answer 2

BECAUSE OF THE FAT RELEASED BY THE FOOD