Too much vitamin C can increase the chances of getting kidney stones.
More info: Though there have been numerous studies on the effects of large doses of vitamin C as a cause of the development of kidney stones, this is not a concern for people with normal healthy diets. The studies conducted concluded that the concern was when mega-doses were ingested over a long period of time.
The National Institute of Health recommends taking vitamin C in amounts no greater than that found in a multivitamin.
What Are Kidney Stones?
Kidney stones are caused by an imbalance of the fluids and minerals found in urine. The rise of crystal-forming minerals and the low level of fluids in the kidney start the crystal formation process, which ends in a kidney stone. Even though kidney stones can contain different forms of crystals, the most common type of kidney stone is made of calcium oxalate or calcium phosphate.
How Much Vitamin C Is Safe?
Vitamin C, also known as ascorbic acid, is a water-soluble vitamin that must be obtained through the diet. Humans require this nutrient for the synthesis of collagen and norepinephrine. It is also a vital antioxidant. Vitamin C deficiency leads to the disease scurvy. This potentially fatal condition rarely occurs in developed countries. The recommended daily allowance of Vitamin C for healthy adult males is 90 mg and 75 mg for healthy adult females. Those who smoke should increase their daily dosages to 125 mg and 110 mg, respectively.