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L-cysteine has a high safety profile and can be used even for a long time. Some sources indicate a beneficial combination of cysteine and vitamin C. Usually, a 1: 3 ratio is recommended.
Cysteine supplementation should be considered by people complaining about the deteriorating condition of the skin, hair, and nails. It will also be beneficial for people exposed to toxic substances, e.g. tobacco smoke or alcohol.
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Cysteine belongs to the group of essential amino acids, synthesized by the body, involved in detoxification of the body. The combination of L-cysteine with glutamine and glycine is involved in the synthesis of glutathione (a powerful antioxidant) and the proteins, enzymes and co-enzymes. Present in the protein product, in smaller amounts in corn and peanuts. The source of the acquisition are also concentrates and whey protein isolates, and preparations containing mixtures of amino acids. Not in the form mono-preparations. It is a component of detoxification, supporting the work of the liver supplements and in supplements improving the cosmetics of the body, usually in the form of L-cystine (two connected cysteine particles) or in the form of NAC.
Dosage: the usual supplementation: 50-500 mg per day.