Tea tree (Melaleuca alternifolia): traditional uses of melaleuca oil on the skin, preparation methods, safe dilution and contraindications.

English oak (Quercus robur): traditional uses of its tannin-rich bark, preparation methods, recipes, contraindications and essential safety precautions.

Rehmannia (Rehmannia glutinosa): traditional uses in Chinese medicine, compounds such as catalpol, preparation methods, contraindications and interactions.

Lingonberry (Vaccinium vitis-idaea): traditional uses, how to prepare leaf tea and juice, phytochemical profile, contraindications and arbutin precautions.

Sunflower (Helianthus annuus): traditional uses of the seeds, leaves and flowers, preparation methods, recipes, active compounds and allergy contraindications.