Cranberry juice concentrate delivers a potent dose of the compounds found in whole cranberries. The key active molecules are proanthocyanidins, or PACs. These PACs work by making it harder for certain bacteria to stick to the walls of the urinary tract.
You can take it as a liquid or a capsule. A standard routine is one or two servings each day. This concentrated form offers more PACs per serving than typical cranberry juice cocktail.
Watch out for a couple of things. Cranberry contains oxalates, so people prone to kidney stones should be careful. It can also boost the effect of warfarin, a prescription blood thinner. Keep your intake steady and let your doctor know you use it.