On another forum, I found this post:
Is anyone familiar with the comfrey “oil” described by Lesley Bremness on p. 131 of The Complete Book of Herbs? It is made by packing dry comfrey leaves into a dark-colored glass jar and leaving them to age for two years. No other ingredients are added. After two years the “viscous amber liquid with some sediment” is poured off into a smaller container.
Further discussion reveals that ‘dry’ leaves, means fresh, not dehydrated, no dew or remaining water, after rinsing.
Original poster has used this preparation, with apparent internal healing.
Do ya’ll see any problems with this? Assuming absence of bird poop, etc.?