L-Cysteine, CAS# 56-89-3, is a amino acid manufactured through fermentation, available as white crystalline powder . L-Cysteine is widely used as nutrition supplements. It is widely accepted as safe food additive in many countries.
No significant side effects reported. L-Cysteine can cause nausea, vomiting, and diarrhea or constipation in specific groups of individuals.
As L-Cysteine is widely known as safe, there is no limit on dosage of intake. However, we still recommend consumers to consult professionals before using large quantity of L-Cysteine for long period.
Special groups refer to newborns, children, pregnant and any other applicable vulnerable groups.
There is no evidence that L-Cysteine could have any negative effects on these vulnerable groups. It should be safe to use L-Cysteine in food for newborns and pregnant. However, we still recommend consumers to consult professionals before using large quantity of L-Cysteine for long period in food for newborns or pregnant.
Generally recognized as safe(GRAS) is a FDA designation that a specific substance or ingredient is generally considered safe by experts, and so is exempted from the usual Federal Food, Drug, and Cosmetic Act (FFDCA) food additive tolerance requirements. L-Cysteine is perfectly safe for using as food additives.
No health issues about L-Cysteine reported up to now.
1. Glutathione and l-cysteine modified silver nanoplates-based colorimetric assay for a simple, fast, sensitive and selective determination of nickel. [Talanta. 2014 Oct]
Author: Kiatkumjorn T, Rattanarat P, Siangproh W, Chailapakul O, Praphairaksit N.
2. Potential Protective Effect of l-Cysteine against the Toxicity of Acrylamide and Furan in Exposed Xenopus laevis Embryos: An Interaction Study. [J Agric Food Chem. 2014 Jul 23.]
Author: Williams JR, Rayburn JR, Cline GR, Sauterer R, Friedman M.
3. Hydrogen sulfide-mediated regulation of contractility in the mouse ileum with electrical stimulation: Roles of l-cysteine, cystathionine β-synthase, and K+ channels. [Eur J Pharmacol. 2014 Jul 5]
Author: Yamane S, Kanno T, Nakamura H, Fujino H, Murayama T.
4. Vitamin D and L-cysteine levels correlate positively with GSH and negatively with insulin resistance levels in the blood of type 2 diabetic patients. [Eur J Clin Nutr. 2014 Jun 25]
Author: Jain SK, Micinski D, Huning L, Kahlon G, Bass PF, Levine SN.
5. Structural, morphological and optical studies of l-cysteine modified silver nanoparticles and its application as a probe for the selective colorimetric detection of Hg(2+). [Spectrochim Acta A Mol Biomol Spectrosc. 2014 Dec 10]
Author: Nidya M, Umadevi M, Rajkumar BJ.