Henry on Nostr: I chop it up add fat and calendula flowers and boil away(ideally a double boiler so ...

I chop it up add fat and calendula flowers and boil away(ideally a double boiler so it prevents it becoming deep fried comfrey). Seems to work regardless of the fat solubility issue.

Seems some people do an alcohol extraction. High proof alcohol is crazy expensive here though so I only ever use that for stuff that needs it like propolis.
If you ever travel to Poland stock up on spiritus it's about expensive as beer there!