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In the beginning, there was castor oil. And for 4,000 years, it was used orally and medicinally, despite its ghastly taste. The greenish extract of a large tropical plant, (Ricinus communis) is the source for castor oil, which is perhaps best known as a laxative, and ricin, a poison (the ricin from one to two seeds can kill an adult), according to www.innvista.com. By Joanne C. Twaddell |