We gave up fruit juice years ago. Instead, we eat an orange or a couple of tangerines each every day (there is so much tomato, green veg and potato in what we eat that we can definitely easily do without the citrus vitamin C, though fresh fruit contains fibre whereas juice contains next to none, and we like 'em). Fresh orange juice ("not from concentrate") contains about the same amount of sugar as, or even a bit more than, coca-cola. I'm a bit suspicious of grapefruit and grapefruit juice. I've heard things...and, let's face it, I can do without.