N-Nitroso sarcosine is a carcinogen and nitrosation product of sarcosine that has been found in cured meat products.^1,2In vivo, N-nitroso sarcosine (225 mg/kg) induces the formation of metastatic liver carcinomas in mice.²

1.Janzowski, C., Eisenbrand, G., and Preussmann, R.Occurrence of N-nitrosamino acids in cured meat products and their efffect on formation of N-nitrosamines during heatingFood Cosmet. Toxicol.16(4)343-348(1978) 2.Wogan, G.N., Paglialunga, S., Archer, M.C., et al.Carcinogenicity of nitrosation products of ephedrine, sarcosine, folic acid, and creatinineCancer Res.35(8)1981-1984(1975)