How to gain weight without side effects ? I am 21 years old . I am very thin. The veins of my hands and feet can be seen clearly. Many people make fun of me for being thin , then I feel very bad. I eat 5 to 6 times a day to gain weight . However, there is no change. How can I be fat then. Or you can get fat by taking any medicine ( name of the medicine available in West Bengal, India ). Please tell me a way.