What vitamins are good for urinary tract infections? Vitamin C prevents bacteria from growing by making urine more acidic. You can take a 500- to 1,000-milligram daily vitamin C supplement. You can add vitamin C-rich foods to your diet, like oranges, lemons, grapefruit, strawberries, and leafy green vegetables.
Can vitamin supplements cause UTI? Vitamin C. Many patients report that vitamin C causes bladder flares when they take supplements. There are studies that found vitamin C supplements can trigger the “need to go” in women.