Doesn't ascorbic acid (Vit C - C6H8O6) get converted into oxalic acid (C2H2O4) during metabolism?<quoted text>
personally, I am of the school of thought that we over supplement our diet with vitamins, leading to strange things such as Kidney stones.
So, the urine of those people who consume plenty of vitamin C should contain a high amount of oxalic acid.
Ascorbate is supposed to readily bond with Ca^2+ ions to form calcium-ascorbate thus preventing the formation of calcium oxalate crystals (kidney stones) from free calcium and free oxalate ions in the kidneys that form in supersaturated solution containing excess of highly reactive free oxalate ions and the less reactive free calcium ions.
Perhaps, those with a genetic disposition towards kidney stones of the oxalate kind should cut down on oxalate rich foods and eat less sodium containing compounds and take in the usual amount of calcium.
Maybe upping the intake of vitamin C could help prevent kidney stone formation.
Besides, ascorbic acid serves as a solvent for calcium phosphate stones.