Vitamin D K2 Kidney Stones. Other smaller short term interventional studies in stone formers 8 and 6 weeks did not show any increase in urinary calcium excretion 5 although a subset of patients may show an increase. Vitamins a d and k2 are best balanced out as they together determine where calcium gets deposited in the body.
While there are five different kinds of vitamin d 1 through 5 only vitamins d2 and d3 are the nutritional ones. Also very high vitamin d levels have led to kidney failure. One large meta analysis concluded that although long term vitamin d supplements increased hypercalciuria it did not increase the risk of kidney stones 4.
Taking high dose vitamin d and calcium supplements may increase the risk of kidney stones in postmenopausal women according to a study in clinical endocrinology which involved 132 women ages 50 and older.
Pending further information people should not exceed the guidelines suggested by the institute of. Also very high vitamin d levels have led to kidney failure. All took 1 200 milligrams of supplemental calcium a day which is the rda for women over 50 and men over 70. Reginald gohh answered 30 years experience nephrology and dialysis.