Sg, please see my advice to Mr. D. Suresh Babu, here in this message Board. Try to practice Pranayam - Kapalbhathi- daily for at least half an hour in the morning while the stomache is empty. Definitely you will gain weight and also can get rid of so many health problems like Diabetes, Hyper tension, Physical strain & weakness, mental strain and even depression. "Kapalbhathi" is just like Mrutasanjivni. Complete immune system is re-vitaliseded.. Try and see the result. Experience is the real guru. I don't have to repent once you start the pranayam ... Thanks ... Unnikrishnan