HerbMate
Turmeric (Curcuma longa) plant
Digestive

Turmeric (Curcuma longa)

Photo: Simon A. Eugster · CC BY-SA 3.0

  • Digestive
  • 7 conditions
  • Licensed photo

Overview

Turmeric (Curcuma longa) is a perennial with a thick rhizome, growing to about 3 ft (90 cm), featuring lance-shaped leaves and pale yellow flowers. Renowned for its bright yellow-orange color, turmeric is a potent anti-inflammatory, antioxidant, and liver-supportive herb commonly employed in Indian cooking and Ayurveda.

Traditional uses & properties

Anti-Inflammatory & Antioxidant: Curcumin counters long-term inflammation in conditions like arthritis, asthma, and inflammatory bowel disease. Hepatoprotective & Cholagogue: Encourages bile flow, supporting liver function and digestion, as well as possibly lowering cholesterol. Blood-Brain Barrier: Known to cross into the brain, reducing inflammation-linked depression or cognitive decline. Gastric Soother: Supports healthy stomach lining, helps neutralize excess acidity, and aids in mild gastrointestinal complaints.

Traditional preparations

Traditional texts describe the preparations below, and where those texts give specific amounts, the amounts are quoted here as part of that record. This is a record of historical practice, not a dosage recommendation - the figures are what the sources say, not what HerbMate tells you to take. Amounts, potency, and safe use vary enormously by preparation, plant part, and person.

STANDARD DECOCTION

2-4 ounces 3 times daily (Water is acceptable, but a better menstruum for the decoction is coconut milk.)

TINCTURE

Fresh root (juice, then decoct to 50% of its original volume and preserve with 25% alcohol); 1-5 ml (0.2-1 tsp.) 3 times daily

POWDER OR CAPSULE

1,000-3,000 mg, 3 times daily

How these are made

Safety & precautions

Blood Thinners & Gallstones: Seek medical advice if on anticoagulants or if gallstones are present. High Doses: Overuse can lead to digestive upset or overstimulation in those who are “hot/dry.” General: Typically safe in moderate amounts.

Drug & food interactions

Turmeric or its constituent curcumin affects the absorption of some beta blockers, increases the absorption of midazolam, but does not affect the absorption of iron. Piperine, from pepper, enhances the bioavailability of curcumin.

Beta blockers
In a clinical study, curcumin, a major constituent of turmeric, decreased the absorption of talinolol, a P-glycoprotein substrate. Curcumin increased the absorption of celiprolol, another P-glycoprotein substrate, in rats. In a randomised study, 12 healthy subjects were given a single 50-mg dose of talinolol after taking curcumin, a major constituent of turmeric, 300 mg daily for 6 days. Curcumin was found to reduce the AUC and maximum plasma level of talinolol by 33% and 28%, respectively, but no clinically significant changes in heart rate or blood pressure occurred.
Midazolam
The interaction between curcumin, a major constituent of turmeric, and midazolam is based on experimental evidence only.
Herbal medicines; Pepper
Piperine, a major constituent of pepper, increases the bioavailability of curcumin, a major constituent of turmeric. In a crossover study, 8 healthy subjects were given a single 2-g dose of curcumin, a major constituent of turmeric, powder alone, or with piperine, a major constituent of pepper, powder 20 mg. When curcumin was given alone, its serum levels were either very low or undetectable. The addition of piperine increased curcumin levels 30-fold over the first 45 minutes, and the relative bioavailability of curcumin was increased 20-fold. Concurrent use was well tolerated.
Iron compounds
Turmeric does not appear to affect the bioavailability of dietary levels of iron. In a randomised, crossover study, 30 healthy women were given a standard Thai meal (fortified with about 4 mg of isotopically labelled ferrous sulfate), with rice, to which 500 mg of ground turmeric had been added. Turmeric was found to have no effect on the absorption of iron.

These entries keep the wording of the reference they come from, and three phrases mean three different things. "No interactions found" means the source looked for reports of that pairing and found none. "No data found" means nothing has been published either way. "Based on experimental evidence only" means the effect has been seen in a laboratory or animal study but not in people - a reason for caution, not a report of harm.

Habitat

Native to southern Asia, especially India, turmeric thrives in warm, humid climates with well-drained soil. The rhizome is harvested in winter, boiled or steamed, then dried.

Traditionally used for

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Frequently asked questions

What is Turmeric (Curcuma longa) traditionally used for?

Traditional sources describe Turmeric (Curcuma longa) as follows: Anti-Inflammatory & Antioxidant: Curcumin counters long-term inflammation in conditions like arthritis, asthma, and inflammatory bowel disease. Hepatoprotective & Cholagogue: Encourages bile flow, supporting liver function and digestion, as well as possibly lowering cholesterol. Blood-Brain Barrier: Known to cross into the brain, reducing inflammation-linked depression or cognitive decline. Gastric Soother: Supports healthy stomach lining, helps neutralize excess acidity, and aids in mild gastrointestinal complaints.

How is Turmeric (Curcuma longa) prepared?

Traditional texts describe the preparations below, and where those texts give specific amounts, the amounts are quoted here as part of that record. This is a record of historical practice, not a dosage recommendation - the figures are what the sources say, not what HerbMate tells you to take. Amounts, potency, and safe use vary enormously by preparation, plant part, and person. STANDARD DECOCTION: 2-4 ounces 3 times daily (Water is acceptable, but a better menstruum for the decoction is coconut milk.) TINCTURE: Fresh root (juice, then decoct to 50% of its original volume and preserve with 25% alcohol); 1-5 ml (0.2-1 tsp.) 3 times daily POWDER OR CAPSULE: 1,000-3,000 mg, 3 times daily

What safety cautions apply to Turmeric (Curcuma longa)?

Blood Thinners & Gallstones: Seek medical advice if on anticoagulants or if gallstones are present. High Doses: Overuse can lead to digestive upset or overstimulation in those who are “hot/dry.” General: Typically safe in moderate amounts.