Sweet flag is an aromatic marsh plant with a long history in Ayurveda, Chinese medicine and Indigenous North American medicine. It’s also one of the few herbs banned from food in the US, because its oil contains beta-asarone, which caused cancer in rodent studies.
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Fennel
Fennel seed is the sweet, licorice-like seed behind many after-dinner teas, traditionally used to ease bloating and gas. Members can read what the research says, typical amounts from the official European monograph, and who should skip it.
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.
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.
Chanca Piedra
Chanca piedra, the "stone breaker" herb of Brazil and India, is a popular tea for kidney, urinary and liver support. Here is its history, what the small studies on kidney stones and hepatitis B actually found, typical amounts, and the cautions to know first.
Rosehip
The bright red fruit left on wild roses after the petals fall has been brewed into a warming winter tea for generations, from Indigenous communities in British Columbia to European kitchens. This profile covers its traditional uses, the joint research that put rosehip powder on the map, and who should go easy on it.
Glutathione
Glutathione is the body's own main antioxidant, and detoxers take it as a supplement to back up the liver's natural clean-up work. Members get the full entry: what the small trials found about whether swallowed glutathione even gets absorbed, typical amounts, and the safety points to know first.
