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What is Cystine?

Cystine should not be confused with cysteine, from which it is derived. Cystine is an oxidized dimer form of the amino acid, cysteine, that is common in many foods such as eggs, meat, dairy products, and whole grains. 


Cystine is believed to play a role in protein synthesis, supports the heart, cardiovascular health, and lungs. It may also aid memory, focus, and contribute to a calm sense of well-being. In addition, Cystine may help contribute to healthy hair.

  • Supports the heart
  • Benefits cardiovascular health
  • Promotes healthy lungs
  • Aids memory & cognition
  • Contributes to a calm sense of well-being
  • Works to promote healthy hair

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Supplement Facts
Serving Size: 500 milligrams
Servings Per Container: -
Amount Per Serving % Daily Value
L-Cystine 500 mg *
* Daily Value not established.
Other Ingredients: None
Free of: Added Sugar, Soy, Dairy, Yeast, Gluten, Additives

Suggested Use: As a dietary supplement, take 500 mg (about 1/5 tsp) one or three times daily, or as directed by a physician.

Store in a dry, cool place