[gspencley]

Ah thanks! It's been a few years since I took a food handling safety course and I remembered Clostridium botulinum being called out as something that "heat won't kill" but you're right, it's the spores, not the toxin itself.

But yeah, as you also pointed out, bi-products that can cause illness are separate issues from "killing living organisms that cause illness", and heat is not always the magic solution. Heavy metal poisoning is another example of something that heat will not take care of.