Materia Medica

Ginger (Zingiber officinale) — Common Ginger, Ginger Root
A whole-plant ginger guide covering Zingiber officinale, culinary use, nausea and menstrual-pain research, preparation and safety. Read more...
Ginkgo (Ginkgo biloba) — Maidenhair Tree, Fossil Tree
A careful Ginkgo biloba guide covering standardized leaf extracts, mixed cognitive research, bleeding cautions, and toxic ginkgo seed concerns. Read more...
Gotu Kola (Centella asiatica) herb reference poster with live plant, cut and sifted herb, powder, traditional uses, research notes, safety information, Roosters Peacock and roosterspeacock.com
Gotu Kola (Centella asiatica) — Brahmi, Indian Pennywort
A whole-plant guide to gotu kola (Centella asiatica), including the living plant, leaves, creeping stems and flowers, cut-and-sifted and powdered forms, traditional use, preparation, safety and folklore. Read more...
Goat's Rue (Galega officinalis) — French Lilac, Italian Fitch
A careful guide to Galega officinalis covering traditional glucose and lactation use, galegine history, metformin context, hypoglycemia risk and safety. Read more...
Goldenrod (Solidago canadensis) — Canada Goldenrod, Common Goldenrod
A guide to Solidago canadensis covering goldenrod identification, traditional urinary use, preparation, Asteraceae allergy and fluid-balance safety. Read more...
Goldenseal (Hydrastis canadensis) — Orange Root, Yellow Puccoon
A careful Hydrastis canadensis guide covering goldenseal tradition, berberine chemistry, CYP2D6/CYP3A4 interactions, pregnancy cautions and conservation. Read more...
Green Tea (Camellia sinensis) — Green Tea Leaf, Matcha
A guide to Camellia sinensis green tea covering caffeine, catechins, tea processing, research, iron absorption and concentrated-extract liver safety. Read more...
Grindelia (Grindelia squarrosa) — Gumweed, Curlycup Gumweed
A guide to Grindelia squarrosa covering gumweed identification, traditional respiratory use, resinous chemistry, limited research and safety. Read more...
Guarana (Paullinia cupana) — Brazilian Cocoa, Zoom
A guide to Paullinia cupana covering guarana seed, Amazonian tradition, caffeine effects, research and stimulant safety. Read more...
Gymnema (Gymnema sylvestre) — Gurmar, Sugar Destroyer
A guide to Gymnema sylvestre covering sweet-taste suppression, Ayurvedic tradition, glucose research, hypoglycemia and medication cautions. Read more...
Original botanical visualization of Chlorella vulgaris, green algal culture with magnified circular cells
Chlorella (Chlorella vulgaris) — Green Algae, Freshwater Algae
A researched guide to Chlorella vulgaris covering microalgal identity, nutrition, processing, modern clinical research, product quality, the vitamin K–warfarin interaction, and safety. Read more...
Hawthorn (Crataegus monogyna) — Mayflower, Thornapple, Whitethorn
A guide to Crataegus monogyna covering hawthorn berry, leaf and flower, traditional heart use, standardized-extract research, medication cautions and folklore. Read more...