I never got to the point where my pee was green but my poop sure was!
Over the course of several weeks I was taking 2 - 3 chlorophyll gel caps per day. No other change to my diet which, admittedly, is too light on fruits and vegetables.
By the end of the two weeks my bowel movement was noticeably less noticeable! It was not free of a smell by any means, and I certainly would not have been comfortable messing my diaper in a public situation. But the smell was greatly reduced. Something along the lines of a fart that wouldn't go away.
I am quite discrete about my diapers and don't poop in public. This experiment just proved to me that I cannot reduce the smell of my poop enough to do so in the future either.
Now, maybe if you are fecally incontinent and are looking to minimize the effect of something that you can't help, Nullo or chlorophyll would be good for your purposes.
It may even be more effective for you if you have a better diet than mine - less meat, more fruit, veggies, and fiber.
I stopped taking them. The improvement in smell was not enough to justify carrying that huge bottle of chlorophyll around and I really didn't want to explain that bottle to my wife who really doesn't approve of my diapers at all.
Don