AKN / Amino Acids /
Learn about Cystine
What is cystine?
Cystine is a type of amino acid. (2)
Cystine is the oxidized dimer form of cysteine. (1)
Cystine is considered to be nutritionally equivalent to cysteine. (1)
Cystine is made up of 2 cysteine molecules bonded together. (2)
According to the USDA, cysteine and cystine are nutritionally equavalent. (2)
What is the RDA for cystine?
The RDI for cystine is 4.1 mg per kilogram of body weight, or 1.9 mg per pound. (1)
100 pounds equals 190 mg
150 pounds equals 285 mg
200 pounds equals 380 mg
What contains cystine?
6 oz of lean pork chops contain 595 mg (1)
roast ham
sausage link
salami
beef
6 oz skirt steak beef contains 587 mg (1)
lamb roast
buffalo roast
beef roast
chicken
6 oz lean chicken breast contains 571 mg (1)
fish
6 oz tuna fillet contains 546 mg (1)
small clams
salmon fillet
tilapia fillet
1 cup of lentils contains 234 mg (1)
1 cup of oatmeal contains 227 mg (1)
2 large eggs contains 292 mg (1)
1 cup of low-fat yogurt contains 127 mg (1)
1 oz of sunflower seeds contains 109 mg (1)
hemp seeds
chia seeds
cashews
1 oz of Swiss cheese contains 82 mg (1)
ricotta
gruyere
gouda
Resources
1. https://www.myfooddata.com/articles/high-cystine-foods.php
2. https://www.livestrong.com/article/531520-food-sources-of-n-acetyl-cysteine/
