India, Oct. 5 -- Rice is a staple in Indian meals, served at home and packed in lunchboxes by officegoers. But for some people, a plate of rice is followed by lethargy and the urge to nap. Why does this happen, and does eating roti leave you feeling less sleepy? What role do portion size and meal balance play? What does nutrition science say, and how simple changes to your meals and daily habits may help?ALSO READ: How to balance both protein and fibre needs in your diet? Expert shares the common ground

Dr Eileen Canday, the head of the Department of Nutrition and Dietetics at Sir H.N. Reliance Foundation Hospital, described why some people feel sleepy after eating rice.

Sleepiness after eating rice can stem from a variety of factors. T...