Body system: Immune

  • Chaga Mushroom

    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.

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  • 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.

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  • Hibiscus

    Tart, ruby-red hibiscus tea is drunk hot or iced from Egypt to Mexico and is one of the most-studied herbal teas for heart wellness. Here's what traditions use it for, what the trials show, how people brew it, and who should check first.

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  • Saline Nasal Rinse (Neti Pot)

    Neti pots and salt-water rinses are one of the most popular home remedies for a stuffy nose, sinus trouble and hay fever. Here's what the trials show, the yogic jala neti tradition, the recipes from allergy and health agencies, and the one water rule you must never skip.

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    The full guide, with how to use it and the safety notes, is in the Remedies Vault.

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  • Thyme

    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.

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  • 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.

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  • Goldenseal

    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.

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    The full guide, with how to use it and the safety notes, is in the Remedies Vault.

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  • Maca

    A hardy root from the high Peruvian Andes, grown at around 4,000 metres for up to 2,000 years. Andean families have long eaten it as a staple food and an energizing tonic, and today it's one of the most popular "superfood" roots for energy and vitality.

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    The full guide, with how to use it and the safety notes, is in the Remedies Vault.

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