Silver Birch (Betula pendula): traditional uses, tea and sap preparation, contraindications, and the pollen's cross-reaction allergy risk.

Passionflower (Passiflora incarnata): traditional uses, tea preparation, synergies, and contraindications of this calming herb for anxiety and insomnia.

Butterbur (Petasites hybridus): a plant used in PA-free extracts, studied for migraine and allergy support; see uses, risks, and contraindications.

Bilberry (Vaccinium myrtillus): traditional uses, preparation methods, home recipes, and contraindications for this antioxidant-rich fruit.

Goldenseal (Hydrastis canadensis): traditional uses, phytochemical profile, preparation methods, and contraindications for this berberine-rich rhizome.