Lithospermum spp. Common name: Common gromwell, Stoneseed
Parts used: Seeds, aerial plant
Constituents: Lithospermum acid (phenolcarboxylic acid); Naphthoquinone derivative (shikonin); Cyclitol (scyllitol); Cyanoglucoside-lithospermocide; Caffeic, chlorogenic and ellagic acids; Catechin-type tannins; Mucilage.
Medicinal actions: Diuretic, emmenagogue, inhibitor of pituitary gonadotropins (FSH and LH), TSH antagonist
Medicinal use: Indicated in hyperthyroidism, especially secondary hyperthyroidism. It will reduce TSH stimulation of the thyroid as well as reduce thyroxine production.
Pharmacy: Infusion: 1 tsp/cup water, TID. Tincture (1:5), 1-5 ml TID
Toxicity: None reported, however this plant is an emmenagogue and is therefore contraindicated in pregnant women.