Doctors are trained in medications, not nutrition. That and they find it more profitable to sell pharmaceuticals.
Add to that, corporate foods goal is to sell us their stuff, not make us healthier unless it's profitable. Any juice or tea blend (etc) will probably not have enough pomegranete or anything else to provide the health benefit. And the fresh fruit section? Best to find produce that was vine-ripened and not treated with chemicals for shipment and display.
I wonder if it's just pomegrante that provides the benefit, or all dark fruits. Today's excursion is going to be to the health food store, to buy pure 100% concentrate to add to tea on my own.