Sarsaparilla root was one of the most famous “blood purifiers” of European and American medicine for about three centuries, and it still turns up in blood-cleanse, skin and men’s tonic blends. Members get the full entry: its history, why doctors doubted it as early as the 1850s, what the research does and doesn’t show, and its digoxin, lithium and kidney cautions.
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Cleavers
The sticky, climbing "goosegrass" weed that clings to your socks is one of herbalism's classic lymph herbs, usually taken as a gentle tea or fresh juice in spring. Members can see how people use it, what little research exists, and who should skip it.
Burdock Root
Burdock root is an edible root that herbalists have long called a "blood purifier", traditionally used to support the body's own exit routes through the kidneys and skin. Members can read what the research does and doesn't show, typical amounts from official herbal monographs, and who should skip it.
Peppermint
Peppermint has settled stomachs and freshened breath since ancient Egypt, and today it's one of the few herbs with solid research behind it, especially for an irritable gut. Here's how tradition uses the leaf and the oil, what the studies show, and who should skip it.
Ginger
Ayurveda calls dried ginger "the great medicine" and Chinese medicine calls fresh ginger its most important herb for nausea. Here's how each tradition uses it, what the trials found for nausea, period pain and sore joints, and which medicines to check before taking it as a supplement.
Flaxseed
The small brown or golden seed behind linseed tea, old-fashioned linseed poultices and today's breakfast sprinkle. Flax has been a food, fibre and folk remedy for thousands of years and is now one of the better-studied seeds for the bowels and blood pressure.
Bitter Melon
A knobbly green gourd that is everyday food from India and China to the Philippines, and the famously bitter "cerasee" bush tea of Jamaica and the Caribbean. Few plants are used in as many traditional kitchens and medicine systems at once.
