No, just that when the average human is confronted with this material that we think is uncomplicated, they tend to recoil inexplicably.

Basically trolls - which are an alien species, what I was before turning into a rainbow drinker - have a variety of blood colors, sorted on the hemospectrum. It's a dark rainbow, with roughly twelve hues. Human blood is relative to this spectrum an improperly bright red -- off it, in other words.