Ok, just had a quick look and Solaray Chlorophyll is made from mulberry leaves. I googled 'nutritional facts and analysis for mullberries' and theres 17.2mg of choline in each serving (140g). This info alone doesn't really tell us much, but the choline seemed quite high compared to the other vitamins.
I have been tested for TMAU and the urine sample said I was positive, as in, my body can not turn the smelly stuff into the non smelly stuff (high levels of TMA), but following that I had a blood test that said I didn't have TMAU. I have never heard anyone comment on a fishy odour, more faecal etc, so I think that if you don't have it 'bad' the smell isn't fishy, more like rubbish/burning rubber/farts/poo to be blunt but polite. However, I tried chlorella and spirulina from the health shop and I could actually smell a fish smell coming from me after a day! I looked up the info on them and spirulina is pretty high in choline. It was then that I noticed that chlorella had choline in too.
I guess I am just thinking aloud here so to speak, but it could be worth looking at some of the other chlorophyll products such as Nullo?
I will be back after a few more days of research :)