Next, pour in the oil – add enough so that the comfrey is covered by about one-half inch of oil. Herbs expand as they soak in liquid, so adding the half inch ensures that they stay covered. Comfrey root will stay at the bottom so it’s easy to tell how much to add, but comfrey...
As the strictinin content in Pu’er tea varies significantly in different sources, those Pu’er teas that are rich in strictinin (>2% by dry weight) appear to be a new type of functional raw material, which can be supplemented to oral care products, such as toothpaste and edible mouth...