Licorice and Mental Health
By Dr. Randi Fredricks, Ph.D.
Licorice (Glycyrrhiza glabra) was one of the most widely known medicines in ancient history, and records of its use
include Assyrian tablets of around 2000 BC and Chinese herbals of the same period.
It has long been used for both culinary and medical purposes.
Used for flavoring and sweetening candies and
medical remedies, licorice also has potent effects of its own, particularly for ulcers and adrenal insufficiencies.
Whole. It is also used for asthmatic coughs, as an antispasmodic and ulcer remedy, and to cool 'hot' conditions.
The roots are unearthed in the autumn of the fourth season. It is grown in India, Spain, Iran, Russia, China & Italy.
Licorice contains an organic compound called glycyrrhizin which raises the body's level of cortisol by
inhibiting its breakdown. Full strength unaltered licorice extract is known to resemble cortisol, one of the hormones controlled
by the adrenals. Because of this action, licorice acts as an adrenal stimulant and assists adrenal production by mimicking
the actions of cortisol. Moreover, research suggests that glycyrrhizin increases the half-life of circulating cortisol in the
body by inhibiting its metabolism and breakdown.
Depression
In one study, glycyrrhizin was shown to slow the clearance of cortisol in patients with adrenocortical insufficiency.
Licorice also contains isoflavans, which have estrogen-like activity, and are thus involved in the modulation of hormonal
activity. A 2004 Israeli study revealed that the phytoestrogens in licorice were beneficial in treating mild to moderate
depression in pre- and postmenopausal women.
Chronic Fatigue Syndrome
Chronic Fatigue Syndrome (CFS) has been associated with low adrenal function resulting from stress that impacts the adrenal glands.
Licorice root has been shown to stimulate the adrenal glands and block the breakdown of active cortisol in the body.
Riccardo Baschetti of Padova, Italy, sent a letter to the New Zealand Medical Journal reporting his personal success in treating
his own case of CFS with licorice root.
If his theory is correct, it occurred to him that licorice consumption, which potentates glucocorticoid hormone action, might
be useful in chronic fatigue syndrome. His CFS had persisted for 20 months with unsatisfactory results with various treatments.
After a few days of taking licorice, his energy returned.
References (To view, roll mouse over the "References" heading; to hide, click on the heading)
Armanini D, Fiore C, Mattarello MJ, Bielenberg J, Palermo M. History of the endocrine effects of licorice Exp Clin Endocrinol Diabetes 2002 Sep;110(6): 257-61.
Baschetti R. Chronic fatigue syndrome and liquorice. New Z Med J 1995;108: 156-7.
Bensky D, Gamble A. Chinese herbal medicine materia medica. Seattle: Eastland Press, 1993.
Brown D. Licorice root: potential early intervention for chronic fatigue syndrome. Quart Rev Natural Med Summer 1996: 95-7.
Fredricks, R. (2008). Healing & wholeness: Complementary and alternative therapies for mental health. Bloomington, IN: Author House.
Ofir R, Tamir S, Khatib S, Vaya J. Inhibition of serotonin re-uptake by licorice constituents. J Mol Neurosci 2003 Apr;20(2): 135-40.
Ojima M. The inhibitory effects of glycyrrhhizin and glycyyrhetinic acid on the metabolism of cortisol and prednisolone-in vivo and in vitro studies. Nippon Naibunpi Gakkai Zasshi 1990;20:66: 584-96.
Snow JM. Glycyrrhiza glabra L. (leguminaceae). Protocol J Bot Med 1996 Winter: 9-14.
Tamura Y, Nishikawa T, Yamada K, Yamamoto M, Kumagai A. Effects of glycyrrhetinic acid and its derivatives on delta 4-5 alpha- and 5 beta-reductase in rat liver. Arzneimittelforschung 1979;29: 647-9.
Tierra, M. (1998). The Way of Herbs. New York: Pocket.
Wood, Matthew. Practice of Traditional Western Herbalism: Basic Doctrine, Energetics, and Classification. Berkeley, CA: North Atlantic Books, 2004.