Re: Not much of a chemist then?
your idea that they have to redo all of the testing is rather implausible. If the amount of tallow is so low, it's not likely to be a critical component, or have a critical impact.
I tell you what. We'll do a run of polymer without the tallow, and you get to stand near the production line and pray we don't have a dust leak or a dodgy earth cable (because, you know, you've already removed one line of defence). Ditto for packing it, and for extra fun we won't use standard bulk transport but bag it up in 25kg bags which I'll let you stack. You will get zapped by every bag you touch, and I suspect that after an 8 hour shift you would probably not even notice if someone tasered you.
Don't worry. I'll keep a fire extinguisher ready. Your hair will need it.
Use your brain: even small amounts of tallow cost money. It needs to be sampled, transported, certified, stored, unpacked (etc etc), so it would have been left out if it wasn't really essential. This produced by a business, not a charity.
Furthermore, there is really no direct correlation between how much you use of something and how important it is or how much impact it may have. Ask anyone who suffers from a nut allergy.