Buchu (Agathosma betulina): traditional uses of the South African plant, preparation methods, essential oil compounds and contraindications of buchu.

Hoodia (Hoodia gordonii): traditional San uses, the P57 compound, preparation forms, liver risks, contraindications and the ban by Brazil's ANVISA.

Cajuput (Melaleuca cajuputi): traditional uses of the essential oil, preparation methods, topical recipes and contraindications for children and pregnancy.

Clove (Syzygium aromaticum): traditional uses, eugenol, preparation methods, recipes and contraindications, with a warning about clove oil in babies.

Blackcurrant (Ribes nigrum): traditional uses, how to prepare the leaf tea and juice, contraindications, and precautions with anticoagulants and diuretics.