Assertion: comfrey | /r/MadeOf | potassium
Facets:
Source sentences:
text: Comfrey contains many vitamins and nutrients such as Vitamin B12, potassium, sulphur, calcium, iron, phosphorus, Vitamin A, Vitamin C, Vitamin B-complex, selenium, iron, germanium and is also an excellent source of protein.
text: The plant contains antioxidant vitamins C, A, and E, and sodium, potassium, manganese, magnesium, protein, phosphorus, and B vitamins.
text: Comfrey contains Vitamins A, B1, B2, B3, B5, B6, B9, B12, C and E, as well as boron, calcium, chromium, cobalt, copper, iodine, iron, magnesium, manganese, phosphorous, potassium, selenium, sodium and zinc.