How It Works
A number of constituents have shown activity in the test tube. The volatile oil, including eucalyptol (cineole), is considered to have potent antibacterial effects12 and to relax smooth muscles in the lungs.13 Rosmarinic acid has antioxidant activity14 and another ingredient of rosemary, known as carnosol, inhibits cancer formation in animal studies.15 No human studies have confirmed rosemary’s use for these conditions.
How to Use It
The German Commission E monograph suggests 3/4 to 1-1/4 tsp (4 to 6 grams) of rosemary leaf per day.16 A tea can be prepared by adding 2 teaspoons (10 grams) of herb to 1 cup (250 ml) boiling water and allowing it to steep in a covered container for 10 to 15 minutes. This tea can be taken several times per day. Rosemary tincture, 1/2 to 1 teaspoon (2 to 5 ml) three times per day, may also be used. The concentrated volatile oil should not be taken internally.
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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2015.