Turmeric vs curcumin: what is the difference, and what does 95% curcuminoids mean?
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Turmeric is a plant whose rhizome is used as a spice or supplement ingredient. Curcumin is one of its main curcuminoids, a family of natural compounds. A 95% curcuminoid extract differs greatly from turmeric powder, but that percentage does not mean 95% pure curcumin, 95% absorption or guaranteed effectiveness. A useful comparison requires the whole label.
Turmeric, curcuminoids and curcumin are not the same thing
Curcuma longa is the plant’s botanical name. Its rhizome can be ground into powder or processed into a concentrated extract. Powder retains a complex plant matrix and varies naturally. Two supplements can both say “turmeric” while providing very different preparations. Their weight in milligrams alone does not make them equivalent.
What are curcuminoids?
Curcuminoids include curcumin, demethoxycurcumin and bisdemethoxycurcumin. Curcumin is the best-known member, but it is not a synonym for the entire group. A label declaring “total curcuminoids” describes that family rather than curcumin alone. Keeping the terms separate prevents misleading comparisons.
Rhizome powder and an extract are not interchangeable
Natural curcuminoid content varies with factors such as variety, origin and analytical method. A European assessment of 21 batches reported an average of 2.34%, with a range of 1.15% to 5.15%. This illustrates powder variability. A 95% extract supplies more curcuminoids by weight than culinary powder, but concentration alone cannot establish greater health benefit.
What does “standardised to 95%” actually mean?
Standardisation indicates the proportion of curcuminoids declared by the manufacturer in the extract. In an extract labelled at 95%, 95% of its weight is attributed to curcuminoids according to the analytical method used. Without a batch certificate of analysis, this remains a declared specification rather than an independently verified guarantee. It does not describe the entire capsule, measure how much reaches the bloodstream or predict an individual result. It also does not show each curcuminoid’s respective share.
A worked example from the NovAging label
The daily serving of NovAging Turmeric contains 175 mg of dry Curcuma longa rhizome extract standardised to 95% curcuminoids. Multiplying 175 by 0.95 gives 166.25 mg of total curcuminoids. This must not be rewritten as “166.25 mg of pure curcumin”. It describes the standardised total and is neither a therapeutic dose nor proof of an effect on joints, digestion, liver health or any other condition.
Why is the milligram figure not enough?
To compare products, identify the plant part, preparation, extract weight, standardised percentage and full daily serving. Conventional curcumin has low bioavailability, so some products add piperine or use other technologies. Greater exposure does not prove greater clinical effectiveness and can change safety considerations. A delivery technology should not be treated as a simple marketing advantage.
Check whether the stated amount refers to powder or an extract.
Identify the percentage and the exact group of compounds being standardised.
Calculate the amount for the full daily serving, not only for one capsule.
Look for ingredients that may alter bioavailability, such as piperine.
Do not infer effectiveness from a high percentage or an isolated milligram figure.
What can human studies currently tell us?
Clinical trials and evidence reviews have reported encouraging signals for pain or function in some people with osteoarthritis, particularly knee osteoarthritis. Yet preparations, doses, study lengths and methodological quality vary considerably. The more cautious reviews conclude that an optimal formulation cannot be identified and that findings from one extract should not be generalised to every supplement. Turmeric should not be presented as a treatment for osteoarthritis, a way to rebuild cartilage or a replacement for appropriate medical care.
The complete formulation matters
One NovAging capsule, intended to be taken at breakfast with water, also contains 150 mg of vitamin C, 50 mg of devil’s claw root powder and 10 mg of black pepper fruit extract standardised to 95%, providing 9.5 mg of piperine. The pack contains 60 capsules, corresponding to 60 days at the stated serving. These amounts describe the product; they do not demonstrate synergy or clinical effectiveness for the complete formulation, which has not itself been tested in a clinical trial.
Liver, biliary and medicine precautions
Rare but sometimes serious cases of liver injury have been reported with turmeric or curcumin supplements, particularly with some concentrated or bioavailability-enhanced preparations. Stop taking the product and seek prompt medical advice if unusual fatigue, persistent nausea, loss of appetite, dark urine, or yellowing of the skin or eyes occurs. Anyone with a current or previous liver condition should obtain medical advice before taking a turmeric supplement.
Ask a healthcare professional before use if you have biliary disease or gallstones.
Do not use with an active gastric or duodenal ulcer because the formula contains devil’s claw.
Check interactions, particularly with anticoagulants, anticancer medicines and immunosuppressants.
Do not use during pregnancy or breastfeeding, or in children and adolescents.
Never change a prescribed treatment in favour of a food supplement.
Frequently asked questions
Are turmeric and curcumin the same thing?
No. Turmeric refers to the plant or a preparation made from its rhizome. Curcumin is one of the curcuminoids naturally found in that plant.
What does 95% curcuminoids mean?
It means the extract has been standardised to contain 95% total curcuminoids. It is not an absorption rate, an effectiveness score or necessarily 95% curcumin alone.
Is a 95% extract always better?
No. It is more concentrated than powder, but suitability depends on the dose, formulation, tolerance, other ingredients and medical circumstances. More concentrated does not automatically mean more appropriate.
Is culinary turmeric equivalent to a supplement?
No. The spice has a different matrix and concentration. Results obtained with a standardised extract cannot be transferred directly to culinary use, and findings about the spice cannot automatically be applied to a concentrated extract.
How should I compare two labels?
Compare the preparation, plant part, daily amount, standardisation level, any bioavailability enhancers and the safety warnings. A comparison based only on capsule weight is misleading.
Editorial methodology
Article updated on 4 September 2026. This review draws on assessments from the NCCIH, EMA and ANSES, together with systematic reviews of human trials. It distinguishes composition, bioavailability and clinical benefit while accounting for differences between formulations. This content is for information only, does not provide a diagnosis and cannot replace personalised advice from a doctor or pharmacist.
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