☯️Traditional Chinese Medicine🏮Taoist Herbal Medicine

Licorice (Gan Cao)

Glycyrrhiza uralensis

About Licorice (Gan Cao)

Licorice (Gan Cao) (Glycyrrhiza uralensis) is a herb used in the Traditional Chinese Medicine and Taoist Herbal Medicine traditions to help with Digestive Issues, Respiratory Issues, Stress, and Inflammation, among 4 other conditions it addresses. The aerial parts and leaves are the parts traditionally used, taken internally.

Botanical background

Glycyrrhiza uralensis, also known as Chinese liquorice, is a flowering plant native to Asia. It is used as a sweetener and in traditional Chinese medicine.

Source: Wikipedia, via iNaturalist

Parts used

Aerial Parts · internalLeaves · internal
🍵

Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Licorice (Gan Cao) in freshly boiled water for 5–10 minutes.
  • Cover while steeping.
  • Strain and drink.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Licorice (Gan Cao) into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
💊

Powder / Capsule

500 mg – 1 g, 1–3× daily
  • Grind dried Licorice (Gan Cao) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
♨️

Steam Inhalation

1–2× daily during acute symptoms
  • Add 2–3 tbsp of Licorice (Gan Cao) to a bowl of just-boiled water.
  • Drape a towel over your head and inhale steam for 5–10 minutes.
🛁

Herbal Bath

2–3× per week as needed
  • Brew 4–6 tbsp of Licorice (Gan Cao) in 1 litre of hot water for 15 minutes, strain, and add to a warm bath.
  • Soak for 20–30 minutes.

Pregnancy, Breastfeeding & Children

Pregnancy

Avoid

Well-documented risk in pregnancy — regular/high licorice consumption (glycyrrhizin) has been linked in research to earlier delivery and effects on child cortisol regulation and behavioral development; most sources advise avoiding significant amounts, especially the concentrated root/extract form.

Breastfeeding

Use Caution

Glycyrrhizin passes into milk; regular use is generally limited given its effect on blood pressure and potassium levels.

Children

Use Caution

Small culinary/candy amounts are generally fine occasionally; regular or concentrated use can affect blood pressure and potassium levels and is not recommended for daily use.

Contraindications

  • Active liver disease — monitor liver enzymes with long-term use
  • CNS medications (benzodiazepines, SSRIs, MAOIs) — may potentiate sedative or serotonergic effects

Warnings

⚠️ Sedatives & Antidepressants

May potentiate the effects of sedative, anxiolytic, or antidepressant medications. Use with caution alongside any CNS-active drugs.

⚠️ Liver Health

Some herbs used for liver conditions can be hepatotoxic at high doses. Have liver function monitored if using long-term.

⚠️ Allergic Reactions

Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

⚠️ Not Medical Advice

This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

Drug & herb interactions

Blood pressure medications

Can raise blood pressure and counteract antihypertensives with prolonged use.

Digoxin

Licorice-induced potassium loss increases digoxin toxicity risk.

Diuretics, corticosteroids

Additive potassium depletion.

Where to find in nature

Native region

China, Taiwan, Korea, Japan

Climate

Temperate to subtropical

Habitat

Mountain forests, river valleys, and cultivated herb farms throughout East Asia

🌿 To see Licorice (Gan Cao) growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.

Where to buy

In store

  • Chinese herbal medicine shops and TCM clinics
  • Chinatown herbal stores and Asian supermarkets with herbal sections
  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices

Online

iHerb

Wide selection of standardised extracts, capsules, and powders with lab testing

Mountain Rose Herbs

Premium bulk dried herbs — certified organic, ethically sourced

Starwest Botanicals

Large selection of certified organic bulk herbs and powders

Herb Pharm

High-quality liquid extracts and tinctures, rigorous quality standards

Amazon

Convenient — verify brand certifications and check third-party testing

Etsy

Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

Quality tips

When buying Licorice (Gan Cao), look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.