Skip to content



L-Cystine is the stable, oxidized form of L-Cysteine. Cystine is known as a disulfide amino acid because it consists of two Cysteine segments with their respective sulfur atoms bonded firmly together. The body can convert L-Cysteine to L-Cystine and vice versa, however L-Cysteine is the more bio-active of the two. L-Cystine has a bland taste and can be taken in powder or capsule form. The powder is water soluble and weighs about 4.6 grams per level measuring teaspoon. An adequate supply of Vitamin C and B6 should always accompany any Cysteine or Cystine supplementation.

The information stated here is not complete and should not be considered a recommendation. Please consult a qualified physician or nutritionist before beginning amino acid supplementation

*The following information, as well as all statements and products on this website, have not been evaluated by the FDA and are not intended to diagnose, mitigate, treat, cure, or prevent any disease or health condition.

Net Orders Checkout

Item Price Qty Total
Subtotal $0.00

Shipping Address

Shipping Methods