I agree the MSD's on Antimonial Butter would make you pass it by.Many of the old recipes mention Lead & Mercury contents.
I drunk water from Lead pipes for 30 years and I still have Mercury thermometers, and I've broken a few.
If we all used MSD's as the bible none of us would be married, now there's a hazard.
DT, yes a boffin could analyse the contents of your jars, but we would all be disappointed with the report.