Yellow gentian (Gentiana lutea): traditional uses as a digestive bitter, preparation methods, phytochemical profile, contraindications and safety precautions.

Black horehound (Ballota nigra): traditional calming and digestive uses, preparation forms, recipes, drug interactions and contraindications in pregnancy.

Gypsywort (Lycopus europaeus): traditional thyroid-related uses, preparation forms, drug interactions, and contraindications of this European herb.

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

Roselle (Hibiscus sabdariffa): traditional uses, how to make hibiscus tea, its mild effect on blood pressure and cautions in pregnancy and with medicines.