regular grape juice &kiddush

Question

Dear Rabbi, I have started using regular grape juice for kiddush, since you say it is yayin mevushal and it is 60% cheaper than kedem. but lately i looked at the ingredients, it isnt?maybe pure grape juice, it has regular grape juice, concentrate grape juice, maybe ascorbic acid=vit c? then again, kedem seems to have all this too, is it real enough grape juice to be kosher for kiddush. thank you jh