Just saying - anyway that garbage they sell in supermarkets is not juice but a juice cocktail. Even the label is misleading stating “pure juice” ... well yeah, you want cranberry juice? Well it says right there on the label “pure juice” and the second two ingredients are apple and grape followed by cranberry and loaded out with corn syrup with the secondary juices added to fill the bottle. I hate that. Better to take a cranberry pill or a grapefruit pill if you’re so inclined.
Pure unsweetened cranberry juice is a bit tart and strong.
As for grapefruit why not just eat the grapefruit? Providing you are not taking one of the medications on the list.
Ocean Spray puts out a pure cranberry juice. You have to read every bottle in the store to find it but it’s there.
80% of the apple juice sold in the USA is apple juice from China. Most of the 'pure juices' is apple from China.