top milk was the culprit in my case - when she turned 1yr old i started giving her top milk but it didnt suit her. neither did banana :( boiled corn helped her tremendously.

how old is ur toddler? pls first identify whats causing the constipation. then ensure u feed him right. pls include grated dudhi/pumpkin/carrot in his dal/rice/khichadi everyday. make him drink lots of water, eat papaya, peas, all greens, soaked raisins, anjeer, prune juice. avoid biscuits, white bread, maida products.