I recommended to a lady who had a very tenacious shingles pain, although the shingles had gone. Whe applied it and told me the pain went like magic.
It can be taken in small quantities internally to detox the alimentary canal. It is used in toothpastes.
It is agsolutely safe to apply to bruises.
I had a broken thumb which got inflamed. The doctor wanted a cast. The technician did not wash the grazing. It got inflamed and smelly.
I asked for the cast to be removed. I washed the wound under tap water and applied a poultice of Fullers earth. In five days, the bruised skin had fallen and new skin grew marvelously. The doctor was very pleased with the progress and told me to carry on!
It is a good product, not an old wives' tale. It works. I recommend it fully.