L-Cysteine is a non-essential amino acid that plays a vital role in the human body. It is commonly used as a food ingredient to improve the texture, quality, and appearance of bakery products such as bread, crackers, and pastries.

L-Cysteine is a powerful antioxidant that helps prevent the oxidation of food and increases the shelf life of baked goods. It also acts as a dough conditioner, improving the elasticity and texture of dough, resulting in a softer, more consistent product.

L-Cysteine is derived from natural sources such as poultry feathers or human hair, but can also be synthesized in a laboratory. The use of L-Cysteine derived from human hair has raised ethical concerns, leading many manufacturers to seek alternative sources.

In addition to its role as a food ingredient, L-Cysteine has been shown to have potential health benefits such as supporting liver function, promoting healthy hair growth, and aiding in the treatment of certain skin conditions.

Overall, L-Cysteine is a versatile and useful ingredient for improving the quality and shelf life of bakery products, while also potentially offering health benefits.