Of course not 無營養 la!! Your body adjust the composition of the milk every now and then, so to fit your baby's need, tailor-made ah, 無營養!? ?-( ?-(
Those people are just ignorant! As long as your bb is eating solid food, I don't think you should wean off bf because other people's opinion law, just follow you heart, that's what's best for you & your bb ah!! :-P