If I want to repair a kitchen utensil and want to be (totally) sure there is nothing poisonous, cancerous, allergenic, [fill in your adjective] in the glue. What should I choose?
Fish glue, rabbit glue, horse glue, [favourite animal] glue springs to mind but I doubt these stand kitchen use with warm water and normal abuse. Besides - if I don't happen to have a horse ripe for slaughter I have to buy the glue already bottled and then there might be preservatives in the glue to keep the, former, horse from developing a new skin of mold fur...
It seems to be more complex than just a "read on the bottle". There is some info on wood whisperer and properly cured epoxy should be safe.