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Medindia » Nutrition Facts » Nutrient Lookup » Cystine Rich Foods

Cystine Rich Foods

(based on levels per 100-gram serving)
Updated on June 03, 2025

Cystine is a sulfur-containing amino acid found in many high-protein foods and plays a role in tissue repair and antioxidant defense.

For most people, cystine is a healthy part of the diet. However, those with cystinuria or related kidney stone conditions may need to monitor their intake.

This nutrition guide highlights foods that are rich in cystine, helping individuals make informed dietary choices - whether they need to include or limit these items. All values are based on a standard 100-gram serving.

Cystine Content in Foods (per 100 gram serving) - Ranked from Highest to Lowest

1. Egg, white, dried, stabilized, glucose reduced (2.212g)

2. Egg, white, dried (2.102g)

3. Egg, white, dried, powder, stabilized, glucose reduced (2.044g)

4. Egg, white, dried, flakes, stabilized, glucose reduced (1.908g)

5. Seeds, cottonseed flour, low fat (glandless) (1.307g)

6. Seeds, cottonseed meal, partially defatted (glandless) (1.288g)

7. Egg, whole, dried, stabilized, glucose reduced (1.148g)

8. Seeds, cottonseed flour, partially defatted (glandless) (1.074g)

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9. Egg, whole, dried (1.07g)

10. Soy protein isolate, potassium type (1.046g)

11. Soy protein isolate (1.046g)

12. Seeds, sesame flour, low-fat (1.012g)

13. Seeds, sunflower seed flour, partially defatted (0.952g)

14. Soy protein concentrate, produced by alcohol extraction (0.886g)

15. Soy protein concentrate, produced by acid wash (0.886g)

16. Seeds, cottonseed kernels, roasted (glandless) (0.855g)

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17. Seeds, sesame flour, partially defatted (0.814g)

18. Soy flour, defatted (0.757g)

19. Beef, variety meats and by-products, spleen, cooked, braised (0.727g)

20. Soy meal, defatted, raw (0.724g)

21. Beverages, Protein powder soy based (0.722g)

22. Seeds, safflower seed meal, partially defatted (0.685g)

23. Spices, mustard seed, ground (0.68g)

24. Fish, cod, Atlantic, dried and salted (0.673g)

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25. Seeds, hemp seed, hulled (0.672g)

26. Peanut flour, defatted (0.669g)

27. Tofu, dried-frozen (koyadofu), prepared with calcium sulfate (0.663g)

28. Tofu, dried-frozen (koyadofu) (0.663g)

29. Seaweed, spirulina, dried (0.662g)

30. Soybeans, mature seeds, raw (0.655g)

31. Soybeans, mature seeds, dry roasted (0.638g)

32. Meat extender (0.627g)

33. Seeds, sesame flour, high-fat (0.621g)

34. Egg, yolk, dried (0.588g)

35. Oat bran, raw (0.576g)

36. Cereals ready-to-eat, wheat germ, toasted, plain (0.576g)

37. Soybeans, mature seeds, roasted, salted (0.567g)

38. Soybeans, mature seeds, roasted, no salt added (0.567g)

39. Soy flour, full-fat, roasted (0.561g)

40. Pork, fresh, variety meats and by-products, kidneys, cooked, braised (0.557g)

41. Soy flour, full-fat, raw (0.556g)

42. Winged beans, mature seeds, raw (0.545g)

43. Spaghetti, protein-fortified, dry, enriched (n x 6.25) (0.54g)

44. Beef, variety meats and by-products, spleen, raw (0.53g)

45. Snacks, pork skins, plain (0.529g)

46. Beef, variety meats and by-products, liver, cooked, braised (0.526g)

47. Egg Mix, USDA Commodity (0.523g)

48. Snacks, pork skins, barbecue-flavor (0.514g)

49. Leavening agents, yeast, baker's, active dry (0.5g)

50. Fish, whitefish, dried (Alaska Native) (0.5g)

51. Fish, roe, mixed species, cooked, dry heat (0.499g)

52. Pork, fresh, variety meats and by-products, liver, cooked, braised (0.491g)

53. Veal, variety meats and by-products, liver, cooked, braised (0.49g)

54. Nuts, butternuts, dried (0.484g)

55. Beef, variety meats and by-products, liver, cooked, pan-fried (0.479g)

56. LITTLE CAESARS 14" Cheese Pizza, Large Deep Dish Crust (0.473g)

57. Veal, variety meats and by-products, liver, cooked, pan-fried (0.471g)

58. LITTLE CAESARS 14" Pepperoni Pizza, Large Deep Dish Crust (0.463g)

59. Nuts, walnuts, black, dried (0.462g)

60. Smelt, dried (Alaska Native) (0.46g)

61. Beef, round, top round, separable lean and fat, trimmed to 0" fat, all grades, cooked, braised (0.46g)

62. Wheat germ, crude (0.458g)

63. Cereals, oats, regular and quick, not fortified, dry (0.455g)

64. Seeds, sunflower seed kernels, dried (0.451g)

65. Beef, round, bottom round, steak, separable lean only, trimmed to 0" fat, select, cooked, braised (0.451g)

66. Fish, caviar, black and red, granular (0.449g)

67. Beef, chuck, arm pot roast, separable lean only, trimmed to 1/8" fat, choice, cooked, braised (0.448g)

68. Beef, chuck, arm pot roast, separable lean only, trimmed to 1/8" fat, select, cooked, braised (0.447g)

69. Beef, chuck, arm pot roast, separable lean only, trimmed to 1/8" fat, all grades, cooked, braised (0.447g)

70. Lupins, mature seeds, raw (0.446g)

71. Goose, domesticated, meat only, cooked, roasted (0.445g)

72. Beef, round, bottom round, steak, separable lean only, trimmed to 1/8" fat, select, cooked, braised (0.445g)

73. Seal, bearded (Oogruk), meat, dried (Alaska Native) (0.444g)

74. Beef, round, bottom round, steak, separable lean and fat, trimmed to 0" fat, select, cooked, braised (0.444g)

75. Beef, round, bottom round, steak, separable lean only, trimmed to 1/8" fat, all grades, cooked, braised (0.443g)

76. Duck, young duckling, domesticated, White Pekin, leg, meat only, bone in, cooked without skin, braised (0.442g)

77. Beef, round, bottom round, steak, separable lean only, trimmed to 1/8" fat, choice, cooked, braised (0.442g)

78. Seeds, sesame seed kernels, dried (decorticated) (0.44g)

79. Pork, cured, bacon, cooked, microwaved (0.44g)

80. Beef, round, bottom round, steak, separable lean only, trimmed to 0" fat, all grades, cooked, braised (0.439g)

81. Seeds, watermelon seed kernels, dried (0.438g)

82. Beef, round, top round, separable lean only, trimmed to 1/8" fat, choice, cooked, pan-fried (0.438g)

83. Chicken, broilers or fryers, giblets, cooked, fried (0.437g)

84. Beef, brisket, flat half, separable lean only, trimmed to 0" fat, select, cooked, braised (0.437g)

85. LITTLE CAESARS 14" Cheese Pizza, Thin Crust (0.436g)

86. Lamb, New Zealand, imported, fore-shank, separable lean only, cooked, braised (0.436g)

87. Cereals, oats, instant, fortified, plain, dry (0.435g)

88. Peanut flour, low fat (0.433g)

89. Beef, round, bottom round, steak, separable lean and fat, trimmed to 0" fat, all grades, cooked, braised (0.433g)

90. Beef, brisket, flat half, separable lean and fat, trimmed to 0" fat, select, cooked, braised (0.433g)

91. Beef, chuck, arm pot roast, separable lean only, trimmed to 0" fat, select, cooked, braised (0.431g)

92. Beef, chuck, arm pot roast, separable lean only, trimmed to 0" fat, choice, cooked, braised (0.431g)

93. Game meat, buffalo, water, cooked, roasted (0.429g)

94. Beef, brisket, flat half, separable lean only, trimmed to 0" fat, all grades, cooked, braised (0.429g)

95. Chicken, broilers or fryers, breast, meat only, cooked, fried (0.428g)

96. Beef, brisket, flat half, separable lean only, trimmed to 1/8" fat, select, cooked, braised (0.428g)

97. Beef, brisket, flat half, separable lean only, trimmed to 1/8" fat, choice, cooked, braised (0.428g)

98. Beef, brisket, flat half, separable lean only, trimmed to 1/8" fat, all grades, cooked, braised (0.428g)

99. Snacks, soy chips or crisps, salted (0.427g)

100. Beef, round, bottom round, steak, separable lean only, trimmed to 0" fat, choice, cooked, braised (0.427g)

Data source: USDA Nutrient Database, SR28

Foods Low in Cystine

Weight Management Tips

Learn What You Currently Eat and Drink

What To Eat and Drink

Make Better Choices

Eat the Right Amount of Calories for You

Decrease Portion Sizes

Eat Fewer Empty Calories

Focus on Foods You Need

When Eating Out, Make Better Choices

Cook More Often at Home

Increase Physical Activity

Decrease Screen Time

Healthy Eating Tips

Tip 1 : Order veggie pizza with toppings like mushrooms, green peppers and onions - ask for extra veggies!

Tip 2 : Shopping tip: Find specials and coupons in your local paper or online for discounts on fresh, frozen, dried or canned fruits.

Tip 3 : To thicken stews and soups use pureed, cooked vegetables such as carrots, onions or potatoes.

Tip 4 : Peanut butter adds protein to a snack. Try it on apple slices, celery, whole grain crackers, or a small square of dark chocolate.

Tip 5 : Enjoy eggs as your protein food choice--up to one a day, on average, doesn't raise blood cholesterol levels!

Tip 6 : Try a whole-grain pancake or waffle mix to start off your day. If made from scratch, use whole-wheat flour for half the flour.

Tip 7 : Try making a sandwich with 100% whole-wheat pita bread, whole-grain tortillas, or whole-wheat wraps!

Tip 8 : Check the Nutrition Facts label found on many packaged meats to compare Calories, sodium, and saturated fat.

Tip 9 : Select vegetables with more potassium, such as sweet potatoes, white potatoes, white beans, tomato products (paste, sauce, and juice).

Tip 10 : Create a whole-grain pilaf using a mixture of barley, wild rice, and brown rice. Check online for recipes.

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