Heme iron can bind to nitrogen to form N-nitroso compounds, which in humans primarily form nitrosyl iron and nitrosothiol products.

“because there's an iron atom in the middle is porphyrin ring there is there that molecule can bind to nitrogen and form some types of n nitro so compounds now here the devil is in the details you guys the Devils in the details because not all and nitro so compounds are created equally and n nitro so compounds have primarily been studied in animal models to see if they are causing cancer and in animal models it is pretty clear that some and nitroso compounds do cause cancer in animals but are these the same and nitroso compounds form when we eat meat no they are not”