Licorice root works by blocking the enzyme that clears the stress hormone cortisol. Its strongest benefits are local and mild: soothing sore throats and canker sores, and, in the form with the blood-pressure-raising compound removed, easing indigestion and reflux. Whole root reliably raises blood pressure and lowers potassium. (Full Review)

Protocol

Digestive (DGL)

380–800 mg

Chewed 15–20 min before meals, up to three times daily

Topical (throat)

~0.5 g gargle

Gargled in water as needed, or a lozenge; applied before intubation for pre-procedure use

Whole root

<100 mg glycyrrhizic acid/day

Taken in the morning; kept below the safety ceiling

Time to effect

Throat relief

Immediate

Topical gargle or lozenge

Digestion (DGL)

Days to 2 weeks

Relief of indigestion and reflux

Whole root

1 to 2 weeks

Blood-pressure and potassium effects build

Benefits

High: Topical relief of throat and mouth irritation

Medium: Symptomatic relief of functional dyspepsia and reflux; peptic ulcer healing and H. pylori eradication; improvement of liver enzymes in chronic liver disease; modest reduction in body weight and body fat

Low: Skin anti-inflammatory and depigmenting effects; anti-androgen support in women; support for symptomatic low blood pressure; menopausal symptom relief

Speculative: Cortisol prolongation for energy and adrenal support; antiviral and immune effects; longevity and cognitive effects

Contraindications

High blood pressure (≥130/80 mmHg)

Heart failure (NYHA class III–IV)

Recent heart attack (<90 days)

Known arrhythmia or long-QT condition

Chronic kidney disease (eGFR <60)

Advanced liver disease or cirrhosis

Existing low potassium

Hormone-sensitive cancers

Pregnancy or breastfeeding

Key Interactions

Thiazide and loop diuretics (hydrochlorothiazide, furosemide)

Cardiac glycosides (digoxin)

Corticosteroids (prednisone, hydrocortisone)

Antihypertensives (ACE inhibitors, ARBs, calcium-channel blockers)

QT-prolonging and antiarrhythmic drugs (sotalol, amiodarone)

Stimulant laxatives, high-dose NSAIDs

Estrogens and oral contraceptives

Insulin and oral diabetes drugs

BP-raising supplements (bitter orange, yohimbine, high-dose caffeine)

CYP3A4 substrates

Risk & Side Effects

High: Hypertension; hypokalemia; pseudohyperaldosteronism with fluid retention and edema

Medium: Reduced testosterone in men; cardiac arrhythmias; muscle injury

Low: Estrogen-like and hormonal effects; pregnancy risks

Speculative: Hypertensive encephalopathy and reversible brain swelling

Monitoring

Marker	Target	Why
Blood pressure	<120/80 mmHg	Detects the main dose-limiting effect
Serum potassium	4.0–4.5 mmol/L	Hypokalemia is the central danger
Serum sodium	135–142 mmol/L	Sodium retention drives fluid overload
Plasma renin activity	Mid-normal for the lab	Suppression signals mineralocorticoid excess
Aldosterone	Mid-normal for the lab	Falls in pseudohyperaldosteronism
Total testosterone (men)	500–900 ng/dL	Licorice can lower it
eGFR	>90 mL/min/1.73m²	Screens kidney strain and a key contraindication

Cadence: Blood pressure weekly for the first month; potassium at 2–4 weeks, then every 1–3 months if use continues

Qualitative Assessment

Daytime energy and morning alertness (the intended effect of the whole root)
Ankle or facial swelling and rapid weight gain (early fluid retention)
Headaches or a "pressure" feeling (possible rising blood pressure)
Muscle cramps, weakness, or palpitations (possible low potassium)
Relief of heartburn or stomach discomfort (the goal of the digestive forms)

Licorice Root for Health & Longevity

Protocol

Benefits

Risk & Side Effects

Monitoring

Qualitative Assessment