Rhodiola
A hardy Arctic and mountain root that Scandinavian, Siberian and Russian folk medicine have long used for endurance, cold winters and recovering strength. Today it's one of the best-known "adaptogens" for everyday stress and tiredness.
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Horsetail
An ancient, jointed plant that looks like a little green bottle brush, horsetail is so rich in silica that people once used it to scrub pots and sand canoes. Here's what tradition and research say about it, and why it should be used carefully.
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Olive Leaf
The silver-green leaves of the olive tree, one of the oldest cultivated trees on earth, have been brewed into a bitter tea around the Mediterranean for centuries. Here's what tradition and research say about them, and who should be careful.
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Cat’s Claw
A thorny vine from the Amazon rainforest, named for the curved hooks on its stems, that Peruvian peoples have boiled into a bitter bark tea for generations. Here's what tradition and research say about it, and who should be careful.
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Berberine
Berberine is the bright-yellow compound behind some of the oldest bitter remedies in Ayurveda and Chinese medicine, from Indian barberry to Chinese goldthread. Today it is one of the most-studied plant compounds for metabolic health, and one of the most interaction-prone, so it is worth reading the safety section first.
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Saw Palmetto
A small Florida palm whose dark berries were food for the Seminole and Ais peoples and became the best-known men's herb in Europe and North America. Here's what tradition and research say about it, and who should be careful.
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Cinnamon
One of the oldest spices in the world, cinnamon was traded from Asia to Egypt as far back as 2000 BC. Ayurveda, Chinese medicine and Persian medicine all use it as a warming herb for digestion, circulation and the womb, and modern researchers are studying it for period pain and metabolic health.
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Turkey Tail Mushroom
A striped, fan-shaped mushroom that grows on fallen logs across North America, Europe and Asia, turkey tail is one of the most studied medicinal mushrooms in the world. It has a long history in Chinese and Japanese medicine as an immune tonic, and its extracts are used in hospitals in Japan and China.
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Lion’s Mane Mushroom
Lion's mane is the shaggy white "monkey head" mushroom of Chinese and Japanese tradition, eaten as a delicacy and used for centuries to support the stomach and, more recently, memory and mood. Here's what tradition says, what the early research shows, and who should be careful with it.
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Ginseng (Asian and American)
Ginseng has been the prized "root of strength" in Chinese medicine for centuries, and American ginseng was a woodland medicine of Indigenous peoples before it became a major export to China. Here's how the two ginsengs differ in tradition, what modern studies show for energy and fatigue, and who should be careful with it.
