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Kratom refers to the plant Mitragyna speciosa Korth., a tree indigenous to Thailand; it is mostly grown in the central and southern regions of the country, and only rarely in the north. The effects of Mitragyna speciosa are described as being a combination of both stimulation and sedation. The stimulatory effects may be shorter in duration than the sedation effect, coming on faster and fading sooner. Kind of like an opiate high.
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