Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Licorice (Glycyrrhiza glabra and related species) has a long history of use in traditional medicine systems, notably Traditional Chinese Medicine (TCM) and Ayurveda, where it is considered an adaptogen and is often used to address fatigue, weakness, and general lack of energy. In TCM, licorice is thought to "tonify Qi," which roughly corresponds to supporting vitality and energy. The traditional rationale is that licorice helps harmonize the effects of other herbs and supports adrenal function, which in turn may affect energy levels.

From a scientific standpoint, there is some evidence that licorice can influence the adrenal glands by inhibiting the breakdown of cortisol through its active compound glycyrrhizin. This effect has led to its use in cases of adrenal insufficiency (historically referred to as "Addison's disease"), but such use is not without risks, and the evidence for benefit in otherwise healthy people with low energy is weak. Most clinical research on licorice focuses on its effects on the digestive system, inflammation, and viral infections, rather than energy or fatigue directly. Therefore, its use for supporting energy is primarily rooted in tradition, with only limited and indirect scientific support.

Overall, the evidence supporting licorice as a treatment for lack of energy is based more on traditional use than on robust clinical trials, and potential side effects (like hypertension and electrolyte imbalances) warrant caution if used for this purpose.

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