Bugleweed Benefits | Thyroid & Cardiovascular Health

Bugleweed Health Benefits

Bugleweed (Lycopus spp.) is a perennial herb with many species. Lycopus europaeus is commonly found in Europe and Asia, and Lycopus americanus is native to North America. Bugleweed is traditionally used in western herbal medicine for hyperthyroidism symptoms and to support a healthy cardiovascular system.

Bugleweed Pharmacology

Botanical Name

Lycopus americanus, Lycopus europaeus & Lycopus virginicus

Other Common Names

Ajuga, Green Wolf's Foot, Gypsy Weed, Gypsywort, Water Horehound & Wolfstrapp.

Part Used


Main Therapeutic Compounds

Essential oils, luteolin, tannin, phenolic acids & flavonoids.

Herbal Actions

TSH Antagonist



Mild sedative

Bugleweed Herbal Benefits

Hyperthyroid Symptoms | Anxiety, Palpitations & Tremor

Hyperthyroidism / Overactive Thyroid

Bugleweed is rich in the phenolic compounds rosmarinic acid, caffeic acid, lithospermic and chlorogenic acids. These compounds may have an antithyroid effect and have been used historically to relieve hyperthyroid symptoms

Recent research has suggested that Rosmarinic acid slows down the way thyroid-stimulating hormone (TSH) stimulates thyroid cells by stopping adenylate cyclase. Rosmarinic acid was shown to form loose bonds with TSH, making it less likely to activate thyroid receptors and produce thyroid hormones. As a result, Bugleweed may calm an overactive thyroid, and relieve the symptoms of Grave's disease and autoimmune thyroiditis. 

One human clinical study examined Bugleweed (Lycopus europaeus) and its effects on the thyroid hormones tri-iodothyronine (T3) and thyroxine (T4) in people with hyperthyroidism. The researchers concluded that the patients in the study who took Bugleweed for three months had reduced urinary T4 compared to the control group. The thyroid hormone reduction may have resulted from Bugleweed reducing the reabsorption of T4 via the kidneys. 

In another clinical cohort study, groups of hyperthyroid patients who used Bugleweed extracts for various amounts of time were compared to a placebo group of hyperthyroid patients. The group who received Bugleweed (Lycopus europaeus) reported statistically significant improvement in hyperthyroid symptoms such as heart palpitations, tachycardia, tremor, and anxiety.

Bugleweed Typical Use

Dried Herb & Powder

100mg - 2g in powder, capsule or tablet form.

Tincture & Liquid Extract

Typical adult use of Bugleweed tincture or liquid extract is approximately 2-5mls daily in divided doses or as directed by your practitioner.

Herbal Combinations

Bugleweed combines well with Lemon Balm, Motherwort, Rehmannia & Reishi Mushroom

Cautions & Safety

Not recommended during pregnancy & breastfeeding. 

Bugleweed is best avoided in hypothyroidism (underactive thyroid).
If you have a medical condition or take pharmaceutical medications, please consult your primary healthcare practitioner prior to use.



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