via Oddity Central:
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A centuries-old slimming remedy is all set to make a comeback after evidence of its use was discovered in old manuscripts during an archaeological dig. The heath pea is a long-forgotten fern-like wild Scottish plant with purple flowers that can apparently suppress hunger and thirst for weeks. Entrepreneurs are now interested in re-introducing the wonder-herb to the world as a dietary supplement that could produce drastic weight loss results.
According to botanical records, the heath pea, also known as bitter vetch, was a vital ingredient of the Highland diet up until the 18th century, when food was scarce. The pea-sized tubers of the plant were stripped off the roots, dried and ingested. Just a couple of tubers were sufficient to provide a boost of energy, and prevent thirst and hunger for days, even weeks. Entire communities are said to have lived off these tubers when crops were poor.