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Cysteine is an essential amino acid that can be obtained from meat, dairy, and plant sources such as onions, broccoli, and Brussels sprouts. It promotes antioxidant production, detoxifies heavy metals and chemicals, and reduces mucosa viscosity. It is recommended for cancer patients, HIV-infected individuals, and those with respiratory problems.
Good animal food sources of cysteine include most meats, especially turkey, duck, and chicken, as well as milk, cottage cheese, and yogurt. Beneficial plant sources of cysteine-containing foods are onions, Brussels sprouts, and broccoli. Wheat germ and oats are also good sources of cysteine. This essential organic compound promotes the production of cell-protecting antioxidants, detoxifies heavy metals and chemicals, and reduces the viscosity of mucosa, making it easier to expel from the lungs. Cysteine is not only important for everyday health, but it is also therapeutic in the treatment of many different diseases and medical problems.
Cysteine, a crucial amino acid, can be made by the body from another amino acid, methionine, or it can be obtained by eating foods rich in this organic compound. Poultry and meat contain the highest amount of cysteine per serving and are therefore the best examples of cysteine-containing foods. There are approximately 0.014 ounces (0.4 grams) of cysteine in 1 cup (235 ml) of cooked chicken and turkey. Egg yolks are also rich in cysteine.
Other sources of cysteine, such as dairy products and vegetables, provide less than 0.007 ounces (0.2 grams) of cysteine per cup (235 ml) of food. While this is a relatively low concentration of cysteine compared to meat sources, it is still much higher than other foods. Dairy products that are strong sources of cysteine include ricotta cheese, yogurt, and cottage cheese.
The best plant-derived foods that contain cysteine include onion, broccoli, and Brussels sprouts. Red bell peppers are also quite rich in this important amino acid. Cysteine supplements are available when a deficiency in this amino acid requires high doses of this organic compound.
It is essential to eat foods with cysteine to get the benefits of this important amino acid. The body transforms cysteine into the powerful antioxidant glutathione. Antioxidants protect cells from free radical damage. For this reason, eating cysteine foods is recommended for cancer patients, people infected with the human immunodeficiency virus, and rheumatoid arthritis patients.
Detoxification of heavy metals and chemicals in the liver is another benefit of cysteine. Occasionally, cysteine supplements are used to control overexposure to heavy metals or some chemicals. Acetaminophen overdoses also respond to cysteine therapy.
This important amino acid is also capable of breaking down the mucosa. Cysteine does this by breaking the disulfide bond in the mucoprotein. This reduces the thickness of the mucosa, which facilitates the displacement of the lungs. Eating cysteine foods is recommended for patients suffering from respiratory problems such as asthma and respiratory or viral infections.
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