Huang Qi, the yellow root behind Chinese "Jade Windscreen" formulas, is one of the best-known qi tonics in traditional Chinese medicine and a popular immune-season herb in the West. Here's what the tradition uses it for, what the (mostly small, Chinese) studies show, the Health Canada amounts, and why people with autoimmune disease or a transplant should steer clear.
A rare Himalayan fungus that grows out of moth caterpillars, cordyceps has been prized in Tibetan and Chinese medicine since at least the 1400s as an energy and lung–kidney tonic. Today almost all of it is grown in labs, and the research is far thinner than the marketing.
Chaga is the black, crusty "birch conk" of the northern forests, brewed for centuries into a dark, earthy tea in Siberia, Scandinavia and Indigenous North America. Here's where it comes from, what the research actually shows so far, and the kidney caution everyone should know before trying it.
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.
A dark mountain resin that Ayurveda has treated as a prized rejuvenating tonic for centuries, now sold worldwide for energy and men's vitality, and one of the supplements most likely to be contaminated.
The kitchen herb behind many old-fashioned cough syrups and mouthwashes. Thyme has been used for chesty coughs, sore throats and digestion since ancient Greece, and it's still an approved traditional cough remedy in Europe.
A small woodland plant of eastern North America with a bright-yellow root, used by Cherokee, Iroquois and other Indigenous nations for sore eyes, wounds and as a yellow dye. It became one of the best-known remedies of 19th-century herbal medicine, and is now so heavily harvested that it's a protected, at-risk species, so where it comes from matters.
Colloidal silver is one of the most talked-about "natural antibiotics" online. Before you buy it, read why health regulators in Canada and the US warn against taking it, and what silver's real history in medicine looks like.
Quercetin is the most common flavonoid in the human diet, the yellow pigment behind onion skins and apple peels. Here's how naturopaths use it, the traditional herbs that are rich in it, and what the research shows.
Zinc is a trace mineral your body uses in hundreds of enzymes, from immune cells to skin repair. Here's how traditional medicine and naturopaths use it, what the research shows, and why more isn't better.
