Of all the things comfrey can do it can certainly keep you busy.
Not only is it a great source of pollen for the bees, it makes a top fertilizer for the garden feeding and nourishing the soil, and it sets bones, and heals (almost overnight) bone and muscle damage.
The leaves are currently on the drying rack to be dried, and powered to create a paste for injured parties out of play. The young flowers and leaves have been tinctures in 25% alcohol. You could just use vodka. Chop the young leaves and flowers up into a jar and add vodka.
Dose: Take 5ml 1 x day. Drink the tea 1 x day.
It will heal inflammation in the gut as well as giving all old creaks and aches a good seeing to.