myfooddata.com
Top 10 Foods Highest in Cystine (Cysteine)
High cystine foods include pork, beef, chicken, fish, lentils, oatmeal, eggs, low-fat yogurt, sunflower seeds, and cheese. The recommended daily intake of cystine is 4.1mg per kilogram of body weight or 1.9mg per pound. A person weighing 70kg (~154 pounds) should consume 287mg of cystine per day.