NIH notes that high vitamin C intake may increase urinary oxalate and uric acid excretion, and this can contribute to kidney stone risk in some people.
A large cohort study found supplemental vitamin C intake was associated with a higher risk of kidney stones in men. People with a history of kidney stones, chronic kidney disease, or oxalate problems should be extra cautious with high-dose vitamin C powders or tablets.
5. Iron Supplements
Iron is essential for making healthy red blood cells, but it is also one of the supplements
