Van you just blew my mind. For the better part of the last 20 years I’ve thought taurine was an animal waste byproduct…..
Yeah I think it's essential for cats as it's in all cat food lol. I think it's essential for humans too, only humans bodies can manufacture it, so not classed as essential (to get from the outside). But that Arnold fella said some researchers have called for reclassification. And of course some nutrients are called "conditionally" essential, there may be instances where you need more than the body is capable of producing. It's supposed to be so good for so many things, even as a kidney protectant, so I just throw it in there from time to time since it's so cheap.
For juicers there are some natural supps that can be very beneficial in my opinion. Like Astragalus for the kidneys (number one worry for bodybuilders, not the liver, kidneys), nattokinase for potential blood clotting issues worsened by anabolics, milk thistle and tauroursodesoxycholic acid for the liver, NAC, acetyl-l-glutathione for improved levels of the "master antioxidant" of the body (anabolics can damage the kidneys and other parts, like brain, through excessive redox) and on and on. I know we joke about pro bbers taking their kidneys and heart and liver supps but they will not hurt at least.