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Artemisinin and Artemisia annua: differences, labels and research
KINGRAY ACADEMY · SUBSTANCES AND INGREDIENTS · ARTICLE 08
Artemisinin and Artemisia annua: differences, labels and research
Artemisia annua is a plant; artemisinin is a specific compound. Learn how plant powders, extracts and isolated substances differ, what label information means and why a laboratory study's findings cannot automatically be applied to another preparation.
The short answer: A plant, powder, extract and isolated substance are not interchangeable. Comparisons require the exact name, content and context; interpreting a study also requires knowing which model produced the finding.
← 07 · The discovery of artemisinin
Artemisinin and Artemisia annua: which is which?
Artemisia annua is the botanical name for sweet wormwood. Artemisinin is a specific compound that can be isolated from this plant. Plant powder, an extract and an isolated substance are therefore different materials.
Searches may also return the shortened term “artemisin”. For accurate comparisons, use the substance name and composition given in the original source. Similar wording in a headline does not guarantee that two texts describe the same thing.
Sweet wormwood
What it describesThe plant Artemisia annua.
What else you need to knowWhich part of the plant was used.
Plant powder
What it describesGround plant material.
What else you need to knowThe quantity and precise identity of the raw material.
Extract
What it describesA mixture of substances obtained by extraction.
What else you need to knowHow it is characterised and whether it is standardised.
Artemisinin
What it describesA specific, chemically defined substance.
What else you need to knowIts actual content and the identity of the sample studied.
Derivative
What it describesA related compound that has been chemically modified.
What else you need to knowThe exact name; it is not automatically the original artemisinin.
How can you read a label without making assumptions?
First identify what the figure actually measures. The weight of a whole capsule, the weight of an extract and the content of a specific substance are different quantities. Also distinguish the amount in one capsule from the amount in the recommended daily portion.
Plant name
Question for the readerDoes it state Artemisia annua?
What the information does not establishThe same composition as another plant with a similar name.
Plant part
Question for the readerIs it the leaf, aerial parts or another part?
What the information does not establishThat all plant parts have the same composition.
Amount in mg
Question for the readerDoes the number refer to powder, extract or an isolated substance?
What the information does not establishThat all the milligrams represent artemisinin.
Amount per portion
Question for the readerIs the value per capsule or per daily portion?
What the information does not establishThat different products can be compared without recalculating.
Standardisation
Question for the readerWhich specific substance does it refer to?
What the information does not establishConfirmation of a health effect.
Warnings
Question for the readerAre restrictions and conditions of use stated?
What the information does not establishThat “natural” means suitable for everyone.
A practical rule: If the label only states the amount of plant powder or extract, do not treat that number as the amount of pure artemisinin.
What do standardisation and extract ratio mean?
Standardisation may refer to the declared content of a specific constituent. You need to know which constituent the manufacturer measures and whether the figure refers to the extract or the finished preparation. The word “standardised” alone is not enough.
An extract ratio, such as 10 : 1, describes the relationship between the starting plant material and the extract obtained, according to the specification used. It is neither the percentage of artemisinin nor a measure of a health effect.
An illustrative calculation, not a dose recommendation: If the specification says that 200 mg of extract contains 5 % of a named substance, the calculation is 200 × 0.05 = 10 mg of that substance. Without knowing what the percentage refers to, you cannot make this calculation.
This is only a mathematical example. It does not describe any product on sale and says nothing about its suitability, safety or effectiveness.
The EMA document concerns the quality of herbal medicines. Here it supports the explanation of extract terminology; it does not constitute approval of a specific food supplement.
Supporting sources: [6]
↑ Back to contentsHow should you read a scientific study?
An article's title is the starting point, not the entire result. Look at the substance studied, the experimental model, the route of administration, the duration and what the authors actually measured.
Laboratory experiment
What is studiedHow a substance behaves under controlled conditions, for example in a cell model.
Main limit to interpretationA cell model is not a whole human body.
Preclinical research
What is studiedA substance's properties before testing in humans; this may include animal models.
Main limit to interpretationThe finding alone does not establish the same outcome in humans.
Clinical study
What is studiedA specific procedure or preparation in a defined group of people.
Main limit to interpretationThe conclusion depends on the design, number of participants and outcomes measured.
Review of several studies
What is studiedA summary of available studies addressing a specific question.
Main limit to interpretationIts conclusions depend on the quality and comparability of the studies included.
Five questions to help assess a headline
Which substance?
Does the study examine artemisinin, a derivative, the whole plant or a specific extract?
Which model?
Does it involve cells, animals or humans? These levels must not be confused.
Which comparison?
Is there a control group, and does the design address the question the authors are investigating?
Which outcome?
What was measured, and for how long? A change in one marker does not answer every question.
Which limitations?
Do the authors discuss uncertainty, a small number of participants, funding or the need for further research?
Even “scientifically studied” needs a follow-up: exactly what, in whom and with what result? The number of citations below an article does not tell you whether those sources support its claims.
↑ Back to contentsFood supplements and medicines: why distinguish the categories?
In the EU, food supplements are classified as foods. Their labelling, presentation and advertising must not attribute to them the ability to prevent, treat or cure human disease. Medicines and foods are governed by different legal rules.
Neither a product's availability in an online shop nor notification that it has been placed on the market is evidence of clinical effectiveness. An administrative record therefore cannot establish an outcome in humans.
This article does not assess whether a specific ingredient or product is permitted in individual markets. It explains the difference between categories and how to read the information.
↑ Back to contentsWhat should you remember when reading further?
Separate the plant name, the form of the raw material, the content of a specific substance and the type of evidence. Each piece of information answers a different question. If the sample specification or a clear study description is missing, conclusions must remain limited.
This text is a guide to terms and information sources. It provides no recommendation for use, treatment protocol or dosage.
Interested in how scientists went from a plant to a specific compound? Read Artemisinin: the history of its discovery, Tu Youyou and Project 523.
Frequently asked questions
Is Artemisia annua the same as artemisinin?
No. Artemisia annua is the sweet wormwood plant. Artemisinin is one specific chemical compound.
Is 200 mg of extract the same as 200 mg of artemisinin?
No. Extract weight describes a mixture. Artemisinin content can only be determined from the relevant specification or analytical data.
Does a 10 : 1 ratio mean 10 % artemisinin?
No. Extract ratio and the percentage of a specific substance are two different figures.
Does standardisation prove a health effect?
No. Standardisation describes a characteristic of the composition according to a specification. By itself, it does not demonstrate an outcome in humans.
Can a cell experiment be extrapolated to humans?
Not automatically. A laboratory model has different conditions and does not assess the whole human body.
Does this article provide instructions for use?
No. It explains terminology, labels and research appraisal. It gives no dosage or recommendation for a specific preparation.
Related reading in the Advice Corner
Sources and further reading
The original sources are listed openly below. Numbers beside sections refer to the relevant supporting material.
