Also if a tool contains a material that has been linked to cause cancer when that material is smoked in high doses, there's your warning.
The worst part of all of it, some times the claims are real, sometimes they're real but under outlandish circumstances, sometimes they're based on studies with a small sample group and no REAL scientific evidence that supports the claim.
California is pseudo science capital of the world, and that's pretty crazy considering some countries' cultures claim rhino horn, ground up mummies, vomit of sperm whales and other wacko stuff as aphrodisiacs