I can't drink pomegranate juice straight because of an interaction with my high dose of Statins (80 mg. Lipitor). I haven't heard of problems with tart cherry juice, but will have to check because it does sound like a good idea. I already buy frozen, unsweetened tart cherries to eat with plain yoghurt, but a splash of said juice in a glass of San Pellegrino sounds like a tea-totaler's idea of heaven. I'm only temporarily totaling my tea, until I get my taste buds back (don't want to waste good wine), but it would be nice to have something pretty and tasty to drink in the mean time.