Applications and Uses of L-Cystine

L-Cystine E921 is used in Food, Beverage, Pharmaceutical, Health & Personal care products, Agriculture/Animal Feed/Poultry. L-Cystine E921 is a amino acid used as a nutritional additive, flavor modifier, dough strengthening agent, and yeast fermentation agent. The application of L-Cystine E921 in sports drinks and supplements, pizza dough, calzones, pie crusts, bread sticks and tortillas, as well as health foods and processed foods.

L-Cystine E921 uses as follows:


In Food

L-Cystine E921 is used as nutritional supplement in food such as in Bagels, Bread Products, pizza dough, calzones, pie crusts, bread sticks and tortillas.

In Beverage

L-Cystine E921 can be used as nutritional supplement in beverage.

In Pharmaceutical

L-Cystine E921 is widely used as Adjuvant therapy in Pharmaceutical. L-Cystine can be used in treatment of surgery and trauma. Cystine along with the amino acid methionine are the amino-acids necessary for wound healing and forming of epithelial tissue. Cystine is known to stimulate the hematopoietic system and promote the formation of white and red blood cells. Cystine is used as a component for parenteral and enteral nutrition.

In Health and Personal care

L-Cystine E921 is used for permanent wave applications. Also cysteine is used for breaking up the disulfide bonds in the hair’s keratin. L-Cystine used in cosmetics and personal care products as hair conditioning agents and skin conditioning agents – miscellaneous. The application such as in baby products, bath products, cleansing products, eye makeup, shaving preparations and hair and skin care products.

In Agriculture/Animal Feed/Poultry

L-Cystine E921 can be used as nutritional supplement in Agriculture/Animal Feed/Poultry feed. Cysteine is used in sheep fee additives to produce wool.

In Other Industries

L-Cystine E921 is widely used as intermediate in various other industries.

  • As intermediate: in manufacturing of various organic chemicals.

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