Turmeric and curcumin: the spice, extracts and label essentials
Turmeric is the golden-yellow spice obtained from the rhizome of Curcuma longa. It can be used fresh, dried or ground in cooking. Supplement labels may instead describe an extract, sometimes standardised for curcuminoids. These are different preparations and should be compared accordingly. [1] [2]
Turmeric and curcumin: what is the difference?
Curcumin is one of the curcuminoids naturally present in turmeric. An extract may contain a much higher proportion of these compounds than ordinary turmeric powder. Ground rhizome, turmeric extract and a standardised curcuminoid extract therefore do not describe the same ingredient. [2]
Why is it studied?
Researchers investigate curcuminoids in relation to cellular redox processes and pathways involved in inflammation. The formulation, amount and delivery method matter when interpreting a study. Laboratory findings describe mechanisms; conclusions about a particular use in people need to reflect the corresponding clinical research. [2]
Turmeric in everyday food
Turmeric works well in rice, pulses, soups, vegetables, marinades and curry dishes. Small culinary quantities add colour and flavour. They should not be treated as equivalent to a concentrated extract or as a way to reproduce a supplement dose.
How to read a standardised extract label
Standardisation tells you the stated proportion of particular constituents. For example, 500 mg of extract standardised to 95% curcuminoids provides 475 mg of curcuminoids. This is an example of label arithmetic, not a dosage recommendation.
- Plant part and preparation: rhizome powder or extract.
- Amount: milligrams per capsule and per daily serving.
- Standardisation: the stated percentage or amount of curcuminoids.
- Additional ingredients: including any ingredients used to change absorption.
Absorption and formulation
Some products combine curcumin with piperine or use other delivery systems to increase absorption. These changes can affect exposure and interactions, so a higher-absorption preparation should be assessed on its own instructions and evidence. [2]
What to consider before use
Follow the product label. If you have biliary problems, liver disease or take medication, discuss supplementation with a healthcare professional first. Liver injury has been reported with some turmeric supplements, including certain enhanced-bioavailability formulations. [2] [3]
If yellowing of the skin or eyes, dark urine, persistent nausea or unusual severe fatigue develops after starting a supplement, stop taking it and seek prompt medical assessment. [3]
Scientific sources
Informational article. Supplement choices should reflect your diet, needs and health history. For diagnosed deficiency, chronic illness, medication use, pregnancy or breastfeeding, consult a healthcare professional.
