Herbs are defined as the plants which have more medical values.
We may get herbs from plants and even from some kind of trees.
Some will think that herbs are only leaves of some plants,
but we will get herbs from leaves, stems, roots and even the liquid producing
by some plants.
Extraction: Taking out the medical valued stuff from those
herbal plants are known as herbal extraction.
There may be different types of herbal extractions
available, as we can do it by liquidizing,
or even by doing the stems and roots powder.