I have read that vsoy multigrain is a milk booster for many mummies. Can I know how much you drink per day?

According to it's website, V-Soy Mutigrain's ingredients include brown rice, black sesame, barley and malt extract -- all of which are galactagogues and believed to increase milk supply. Thus I suppose it is good to drink when lactating. As with everything, best to drink in moderation -- maybe drink it to supplement your meals e.g. three times a day :)