4,000-year-old teeth reveal the earliest use of this psychoactive substance
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History uncovered Asia See all topics Facebook Tweet Email Link Link Copied! Follow For the first time, archaeologists have used advanced scientific techniques on 4,000-year-old dental plaque to confirm traces of betel nut chewing in ancient Thai communities. Betel nuts are usually chewed as “quids,” a mix of slaked lime and ground betel nuts—which contain psychoactive compounds that boost energy, alertness, euphoria, and relaxation—wrapped in a betel leaf. The stimulant, which can leave a red,
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