Diet for Cystine Stones
Cystine Stones contain cystine, a product of the amino acids cysteine and methionine. Amino acids are the building blocks of proteins. Thus the simplest way to reduce the amount of cystine in the body is to limit your intake of protein.
Excessively acidic urine encourages cystine stone formation. Raising the pH of the urine (or making it alkaline ) helps to dissolve a cystine stone.