Fish contain significantly more pre-formed TMAO than the TMAO produced from choline and carnitine in an equivalent amount of meat.

“fish do have approximately 40 times more TMAO in a preformed state than what might be made out of an equivalent amount of choline and carnitine found in an the same amount of you know meat as fish so our six ounce piece of fish is going to have 40 out 40 times more TMAO approximately I'm just kind of I think that's about the right number a six ounce piece of fish is gonna have 40 times more TMAO than the amount of TMAO that you would make from the choline and carnitine and six ounces of meat”