Noni (Morinda citrifolia): traditional uses, compounds, preparation, potassium and liver warnings, drug interactions and the sales ban in Brazil.

Madder (Rubia tinctorum): its history as a dye plant, traditional uses, root phytochemistry and the genotoxicity warnings that accompany the plant.

Cat’s Claw (Uncaria tomentosa): an anti-inflammatory, immunomodulatory Amazonian plant; see preparation, contraindications, and drug interactions.

Arabica coffee (Coffea arabica): guide to traditional uses, brewing methods, and contraindications for caffeine sensitivity and pregnancy.

Sweet woodruff (Galium odoratum) is a low perennial herb that carpets Old World woodland floors and releases its coumarin scent only once dried.