I gave my child gerber juice from mid of 5th month.doctor recommende to start solids from 5th month .?

my boy dint accept it with milk so tried with gerberjuice and he liked that so i cont.. giving him cereal with juice but now i worried regarding this.now he is 6months 2weeks old. now i am cont giving milk, 2 times cereal with juice and gerber food 1 pack daily from start of 6th month. is itok.please let me know .giving juice with cereal doesnot harm my baby right.please let me know