This is because a junk food diet really is devoid of nutrients. The nutrients you get from your food are the raw materials your body needs to construct new cells. If you are not getting enough of the correct food then you really will not gain weight in a sensible manner.

1 महीने में 5 kg वजन बढाए और दुबले-पतले शरीर को मोटा करने का उपाय/ How to gain weight fast in hindi