© J.M.Garg · CC BY 3.0 · Commons
Turmeric
CautionKurkuma · (Curcuma longa)
Ginger family (Zingiberaceae)
Description
The vivid orange-yellow of its rhizome makes turmeric one of the most intensely colouring spice plants there is — even small amounts stain hands, fabric and kitchenware persistently. Harvested year-round, this ginger-family rhizome contains curcuminoids, chiefly curcumin, along with an essential oil rich in ar-turmerone and abundant starch. Commission E recognises turmeric for digestive complaints linked to liver and bile function; traditionally the root was also applied to skin problems and wounds, and in Ayurvedic use for joint discomfort. As a culinary spice in ordinary amounts, turmeric is considered safe. High-dose extracts, however, can cause gastrointestinal upset or elevated liver values and should be used under medical supervision. Because turmeric stimulates bile production, caution is needed with gallstones or narrowed bile ducts, where it can trigger a painful colic.
Dried turmeric rhizome powder for dyspeptic complaints — positive Kommission E monograph for Curcumae longae rhizoma.
Preparation & dosage
POWDER / SPICE (Kommission E): 1.5–3 g dried turmeric powder (ground rhizome) per day in 2–3 portions with meals — stir into warm dishes, soups or milk. Daily dose per Kommission E: 1.5–3 g crude drug. Indication: dyspeptic complaints (bloating, flatulence, sluggish digestion, loss of appetite). Do not use in gallstones or bile duct obstruction without medical evaluation. Seek medical advice if complaints persist beyond 8 weeks.
- Dry amount
- 1.5–3 g
- Doses per day
- 3×
- Max duration
- 8 weeks
Traditional turmeric tincture for digestive support — EMA-recognised traditional use.
Preparation & dosage
TINCTURE (1:5 in 45–60 % ethanol): 1–2 ml (~20–40 drops) 3× daily before meals, diluted in water. Traditional use (EMA) for relief of mild dyspeptic complaints, bloating and flatulence. Effect after 1–2 weeks of regular use. Avoid in bile duct obstruction or gallstones without medical advice. Due to ethanol content, not for alcohol or liver disease.
- Liquid amount
- 1–2 ml
- Doses per day
- 3×
- Max duration
- 6 weeks
Turmeric infusion from ground rhizome as digestive tea — bitter taste, choleretic and carminative action.
Preparation & dosage
INFUSION / DECOCTION: 1–1.5 g finely grated or ground turmeric rhizome in 200 ml boiling water (or simmer briefly 5 min), steep 8–10 min, strain. 2–3× daily fresh, preferably 20–30 min before meals. Add a pinch of black pepper (piperine) and/or a little fat (coconut oil, milk) — markedly improves curcumin bioavailability. Traditional use for digestive complaints and to stimulate bile flow. Not for bile duct obstruction or known symptomatic gallstones.
- Dry amount
- 1–1.5 g
- Doses per day
- 3×
- Max duration
- 6 weeks
Turmeric in the kitchen as an anti-inflammatory spice — 'golden milk' and curry dishes, Ayurvedic tradition for joint complaints.
Preparation & dosage
KITCHEN / SPICE: 2–4 g turmeric powder daily in food, smoothies or the so-called 'golden milk' drink (250 ml warm plant milk + 1 tsp turmeric + pinch of pepper + ginger + a little fat). Used in folk medicine and Ayurveda as anti-inflammatory adjunct for joint complaints. Clinical studies show moderate effect on CRP and IL-6 with regular intake, though bioavailability of curcumin in plain powder is low. Complements a balanced diet; does not replace medical therapy for inflammatory-rheumatic conditions.
- Dry amount
- 2–4 g
- Doses per day
- 1×
Turmeric paste applied externally — folk remedy for skin inflammations, eczema and minor wounds in Ayurveda and Asian folk medicine.
Preparation & dosage
PASTE / SALVE (external): Mix fresh grated rhizome or turmeric powder with a little water or coconut oil into a paste, apply to affected skin area, leave 20–30 min, then rinse off. Folk use for superficial wounds, skin irritations, eczema and minor inflammations. Caution: turmeric stains skin and clothing intensely yellow — wear gloves, protect clothing. For open wounds or larger skin defects prefer medical evaluation. Do not apply to eyes or mucous membranes.
Folk bitter tonic tincture with turmeric as main component — liver and bile support in German herbal medicine.
Preparation & dosage
BITTER DIGESTIVE TINCTURE (folk): 0.5–1.5 ml turmeric tincture (1:5 in 45 % ethanol) combined with other bitter herbs (e.g. artichoke, dandelion, milk thistle) as a compound tincture, 3× daily before meals, diluted in water. Traditionally used as a liver and bile tonic — stimulates bile flow and promotes fat digestion. Folk use in German and Austrian herbal medicine. Not for gallstones without medical advice; gallstone colic can be triggered.
- Liquid amount
- 0.5–1.5 ml
- Doses per day
- 3×
- Max duration
- 4 weeks
Traditional cold remedy 'Haldi-Doodh' (turmeric latte) — Ayurvedic home remedy for colds, sore throat and febrile infections.
Preparation & dosage
AYURVEDIC USE (traditional): Turmeric powder in warm milk with honey (Haldi-Doodh / turmeric latte) for colds, sore throat and febrile infections. Used for millennia in Ayurveda and South Asian folk medicine as a fortifying general remedy and immunomodulatory home remedy. No clinical evidence of antiviral activity in humans; adjunctive and comforting use. Not a substitute for conventional therapy in severe infections.
IMPORTANT: Turmeric as a culinary spice in usual cooking amounts is considered safe. High-dose extracts (curcumin capsules, standardised extracts) may cause GI complaints, nausea or elevated liver values — medical supervision recommended for long-term or high-dose use. Turmeric stimulates bile production: in gallstones or bile duct obstruction this can trigger painful biliary colic — observe contraindication. Avoid if known hypersensitivity to Curcuma species or other Zingiberaceae. Turmeric stains intensely yellow — protect hands, clothing and utensils.
Turmeric as a culinary spice in normal cooking amounts is considered safe in pregnancy. Medicinal doses (> 3 g/day powder) or concentrated curcumin extracts should be avoided — insufficient safety data; theoretically uterus-stimulating at very high doses (Ayurveda traditionally uses turmeric as an emmenagogue). Per WHO and EMA: traditional medicinal use not recommended in pregnancy.
As a culinary spice in usual amounts, considered safe during lactation. High-dose curcumin extracts not recommended during breastfeeding due to lack of data — transfer to breast milk insufficiently studied.
Turmeric as a culinary spice in age-appropriate amounts is safe for children. Medicinal preparations (capsules, tinctures, standardised extracts) not recommended for children under 12 due to lack of safety data. Consult a doctor for children with bile problems.
Drug interactions
Antikoagulantien / Thrombozytenaggregationshemmer (Warfarin, Phenprocoumon, Clopidogrel, Aspirin)
Curcumin inhibits platelet aggregation in vitro and may additively enhance anticoagulant effects. With high-dose curcumin supplements there is an increased bleeding risk (prolonged INR). Culinary amounts are considered safe. For medicinal use: INR monitoring and medical consultation.
Antidiabetika (Metformin, Sulfonylharnstoffe, Insulin)
Curcumin may moderately lower blood glucose (insulin-sensitising effect in animal studies and smaller clinical trials). Combined with antidiabetic drugs, there is a theoretical hypoglycaemia risk. Blood glucose monitoring is recommended.
CYP3A4-Substrate (z. B. bestimmte Statine, Immunsuppressiva, Benzodiazepine)
High-dose curcumin inhibits CYP3A4 and CYP2C9 in vitro (Phase-I metabolism). Theoretical increase in plasma levels of drugs metabolised by these enzymes. Clinical relevance at culinary amounts not established; with high-dose extracts and polypharmacy: medical consultation.
Protonenpumpenhemmer / H2-Blocker (Omeprazol, Pantoprazol, Ranitidin)
Turmeric stimulates gastric acid secretion and bile production — in patients with ulcer or reflux on acid-blocking therapy, it may worsen symptoms or reduce the effect of acid blockade. Use in known peptic ulcer: medical evaluation required.
Contraindications
- Bile duct obstruction (choledocholithiasis, bile duct stenosis, cholestasis) — increased bile stimulation can trigger painful biliary colic.
- Symptomatic gallstones (with colic) — turmeric stimulates gallbladder contraction and can provoke biliary colic. Asymptomatic gallstones: consult a physician.
- Hypersensitivity (allergy) to Curcuma longa or other plants of the Zingiberaceae family.
- Pregnancy and lactation (medicinal doses / concentrated extracts) — avoid due to lack of data.
- Acute cholecystitis or acute hepatitis — do not use without medical supervision.
Harvested part: rhizome (fresh or dried, powder)
- Time of day:
- In cultivation areas (South and Southeast Asia, Caribbean) rhizomes are harvested in the dry season — 7–10 months after planting, when the aerial parts (leaves, stems) have died back or yellowed. No strict time-of-day requirements; harvest preferred on dry days for better storage.
- Drying:
- Freshly harvested rhizomes: wash thoroughly and remove roots. For drying: cut into 5–7 cm pieces or slices (~5 mm), dehydrate at 50–60 °C in a food dehydrator or oven (door slightly ajar) for 6–12 hours until pieces are hard and brittle. Traditional method: simmer in water for 45–50 minutes (to reduce bitterness and fix colour), then air-dry in a ventilated shaded spot for 10–15 days. Dry rhizomes are ground in a coffee grinder to fine powder. Fresh rhizomes can be used directly in the kitchen and keep 2–3 weeks refrigerated.
- Storage:
- 24 months — Store ground turmeric powder airtight in dark glass or tin containers, cool, dry and away from light. Shelf life of powder: 2–3 years with good storage (curcuminoid content decreases with light and heat exposure). Whole dried rhizomes keep longer than powder. Fresh rhizome: refrigerated 2–3 weeks, frozen 6–12 months.
- Time of day:
- Turmeric leaves are used in South and Southeast Asia as a culinary ingredient and traditional remedy — harvest fresh, fully developed leaves during the main growing period (rainy season), preferably in the morning after dew has dried. Leaves can be used fresh (as wrappers for steamed dishes, e.g. patoleo in Goa) or dried.
- Drying:
- Spread fresh turmeric leaves thinly in the shade in a well-ventilated spot at max. 40 °C until dry and crisp (approx. 3–5 days). Do not dry in direct sunlight — chlorophyll and aromatic compounds are destroyed. Dried and powdered, they can be used as a seasoning or for tea preparation. Fresh leaves can also be used as a vegetable (curries) or as a wrapper for steamed dishes.
- Storage:
- 12 months — Store dried turmeric leaves airtight, dark and cool — shelf life approximately 12 months. Fresh leaves wrapped in a damp cloth in the refrigerator keep for 5–7 days.
- Curcumin (Diferuloylmethan, E100)Phenolic acidContent: 2-5 %Rhizome
Main active compound and lead substance of the turmeric rhizome. Curcumin is a diarylheptanoid polyphenol with intense yellow colour (food colourant E100). Anti-inflammatory via inhibition of NF-κB, COX-2 and lipoxygenase; antioxidant, choleretic (bile-stimulating) and hepatoprotective. Bioavailability from powder very low (~1 %); markedly increased by piperine (from black pepper) or lipid carriers.
- DemethoxycurcuminPhenolic acidContent: 0.5-2 %Rhizome
Natural curcuminoid analogue alongside curcumin — demethoxycurcumin contributes to the total curcuminoid complex activity. Pharmacological properties similar to curcumin (antioxidant, anti-inflammatory) but of lower intensity. Commercial extracts typically contain a blend of all three curcuminoids in approximately 75:15:10 ratio.
- BisdemethoxycurcuminPhenolic acidContent: 0.1-0.5 %Rhizome
Third natural curcuminoid in the rhizome — the smallest proportion of the three curcuminoids. Also exhibits antioxidant and weakly anti-inflammatory properties; shows somewhat different activity patterns from curcumin in in vitro studies.
- Ätherisches Öl (ar-Turmeron, Turmeron, Zingiberen, Curcumen)Essential oilContent: 3-7 %Rhizome
The essential oil constitutes 3–7 % of the dried rhizome, consisting mainly of sesquiterpenes (ar-turmerone, α-turmerone, β-turmerone ~50–60 %) and monoterpenes (zingiberene, curcumene). Responsible for the characteristic spicy-earthy aroma and taste. Shows antimicrobial and anti-inflammatory properties in vitro; contributes to the overall activity of whole-drug preparations.
- Stärke (Amylose, Amylopektin)PolysaccharideContent: 30-40 %Rhizome
Turmeric rhizome contains large amounts of starch as the main storage substance — principal component on a dry-weight basis. Nutritionally relevant; does not contribute significantly to the pharmaceutical activity. Explains the use of turmeric powder as a thickener and flour substitute in the food industry.
- Bittere Sesquiterpene (ar-Turmeron als Bitterkomponente, Zingiberen)SesquiterpeneContent: 1-3 %Rhizome
Sesquiterpenes from the essential oil — alongside curcuminoids, contribute to the characteristic slightly bitter, spicy taste of turmeric. Contribute to the choleretic (bile-stimulating) and carminative action of the whole drug. Recognised as part of the active complex in the Kommission E assessment.
- Proteine und AminosäurenOtherContent: 6-8 %Rhizome
Turmeric rhizome contains notable protein content (6–8 % of dry weight). Nutritionally relevant; not primarily pharmacologically significant. A glycoprotein (turmerin) shows antioxidant and proteinase-inhibiting properties in vitro.
- Mineralien (Kalium, Eisen, Mangan, Zink)MineralContent: 3-5 % (Gesamtasche)Rhizome
Turmeric rhizome is rich in potassium and contains notable amounts of iron and manganese — nutritionally relevant with regular use as a spice. At therapeutic dosing (1.5–3 g/day) the minerals make no significant contribution to daily intake. Manganese is required in enzyme cofactors (superoxide dismutase).
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