Growing and harvesting of medicinal plants for beneficial health and beauty
There are two main classes of medicinal preparations - herbal and pharmaceutical. Pharmaceutical drugs are either synthesized or refined substances. On the other hand, herbal medicine is defined by the World Health Organization (WHO) as labelled and final medicinal products containing parts of plants (underground or aerial), plant materials, or combinations of both, as their main active ingredient. Plant materials may come in the form of gums, juices, essential oils, fatty oils, and other similar substances. Herbal drugs may also contain starch or other additives to improve the needed adhesive quality for preparing tablets or pills. However, medicines that have plant material mixed with chemically-active substances are not considered herbal. These include drugs that contain small amounts of isolated plant constituents.
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the narator was a dreadful microsoft sam. The book was short and not detailed at all. I would have rather read a short article, since they at least might have sources or other resourses.
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