A patient with a history of recurrent kidney stones is advised to follow a diet low in which amino acid to reduce the risk of stone formation?

A Lysine
B Arginine
C Methionine ✓
D Cysteine

Explanation

Methionine is an amino acid that can increase the production of oxalate, a common component of kidney stones. Reducing methionine intake can help decrease the risk of stone formation.

Source

Clinical nutrition guidelines
Metabolic and Nutritional Disorders Clinical Nutrition Diet Therapy for Kidney Stones Medium MEDICAL Confidence: medium