Carrageenan: All your key questions answered
1. Carrageenan: What is it and what does it bring?
2. Carrageenan: Ingredient status & label declaration
3. Carrageenan: Consumption & safety status
4. Carrageenan: Health concerns & interpretations
1. Carrageenan: What is it and what does it bring?
“Carrageenan in one sentence: what is it?”
Carrageenan is a water‑soluble polysaccharide extracted from red seaweed that helps foods get the right texture – thickening, stabilizing, or gelling.
“Where and why is it used in foods & beverages?”
Carrageenan plays an important functional role in foods by helping to keep ingredients together (stabilization), supporting creaminess/mouthfeel and helping to achieve fat or sugar reduction targets. Moreover, it can help with gel structure.
While more commonly used in dairy products thanks to its synergy with milk proteins (flan desserts being the most popular), carrageenans are also used in desserts & ice cream, infant nutrition, meat and fish products, condiments, confectionery and also pet food.
Carrageenan is used in conventional food, permitted in processed foods marketed as organic1, and suitable in foods marked halal, kosher, and vegan.
“Where does the name come from?”
Carrageenan, which is derived from red seaweed, has been consumed for centuries and used in foods for over six hundred years. Its name comes from the Celtic word “carrageenin” which means mossy rock.
1Approved for use by NOSB (National Organics Standards Board)
2. Carrageenan: Ingredient status & label declaration
“How is it declared on a label?”
It is a food additive, and in the EU it appears as E407 or carrageenan, and E407a for processed Eucheuma seaweed (PES).
Food ingredients are substances that are used in the production or preparation of a food and remain present in the final product, even if in altered form. They provide nutritional value and provide specific characteristics. They are the building blocks of our meals, the raw materials that are transformed through cooking, processing, or preservation into the edible items we enjoy.
Food additives, on the other hand, are substances added to food for a specific technological purpose, such as preservation, coloring, sweetening, or other functions. They are not normally consumed as food itself and are not used as a characteristic ingredient of food. Food additives must be assessed for safety before they can be used in food.
“Is it ‘natural’?”
Carrageenan is derived from red seaweed and used for specific technical functions (stabilize/thicken/gel). While it undergoes an extraction and purification process, it is of nature derived origin.
3. Carrageenan: Consumption & safety status
“Is carrageenan safe to eat?”
Carrageenan, which is derived from red seaweed, has been consumed for centuries and used in foods for over six hundred years.
In Europe, carrageenan is approved as a food additive under Regulation (EC) 1333/2008.
As all food additives authorized in EU, it underwent a thorough safety assessment when it was first placed on the market in 1978, as well as in subsequent re-evaluations. These periodic re-evaluations provide the opportunity to review new evidence and to confirm that exposure assessment is still reflecting additive use levels. In its latest assessment in 2018, the European Food Safety Authority’s (EFSA) re‑evaluation1 noted no safety concerns for carrageenan and processed Eucheuma seaweed2.
Carrageenan has also been reviewed and approved by food safety authorities in the United States, the European Union, the Japan Ministry of Health, the Brazilian Health Surveillance Agency, Health Canada, Food Standards Australia/New Zealand, the China Ministry of Health, and others. In July 2014, the Joint Expert Committee on Food Additives (JECFA) – an international expert scientific committee administered jointly by the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) – determined carrageenan is safe for use in all populations, including infants.
“Can carrageenan be used in organic foods?”
Yes, carrageenan is allowed to be used in conventional food, permitted in processed foods marketed as organic3, and suitable in foods marked halal, kosher, and vegan.
1 https://doi.org/10.2903/j.efsa.2018.5238
2 Because of the structural similarities of processed Eucheuma seaweed and the conventionally processed food-grade carrageenan, the EFSA Panel included the re-evaluation of processed Eucheuma seaweed (E 407a) in that of food-grade carrageenan (E 407).
3Approved for use by NOSB (National Organics Standards Board).
4. Carrageenan: Health concerns & interpretations
“Has carrageenan been included in studies showing harmful health impacts?”
Yes, there have been (recent) studies (e.g., NutriNet‑Santé in France) that have been used in media. However, most misunderstandings about the safety of carrageenan are a result of misinterpreted research.
- Many studies are observational studies, meaning they have not established a cause-effect relationship. They may show associations, but this does not establish causation.
- Authors themselves highlight limitations such as confounding factors and measurement uncertainty.
- Furthermore, some researchers have used quantities that overestimate the amount a person would ever consume, administered carrageenan to test subjects in ways that are not representative of how humans consume it in food, or used degraded carrageenan which is not allowed in food.
“Is carrageenan the same as poligeenan (aka “degraded carrageenan”)?”
No, and this is one of the biggest sources of confusion. Poligeenan/degraded carrageenan is a different, lower‑molecular‑weight material used for non‑food applications such as pharmaceutical applications and is not authorized as a food additive. It is chemically degraded in harsh temperatures and acid conditions. EFSA explicitly notes that poligeenan is not authorized for food.
Food rules also include specifications around low‑molecular‑weight fractions – that’s part of how regulators keep definitions tight.
“If it is approved, why do some retailers/apps “flag” it?”
Often these classifications are based on consumer perception or positioning, not regulatory safety conclusions. For example, people may see an E‑number and assume it is “synthetic,” and some tools may conflate carrageenan with poligeenan. Retailer or app policies are often more restrictive to reflect brand positioning and may be driven by label and ingredient simplification and not regulatory risk conclusions.
Think of it as: science/regulation answers “is it safe?” while retail/apps often answer, “does this feel acceptable to my shoppers?”
In summary
Like many well-known ingredients, carrageenan sits at the intersection of science and perception. The more we look at the data, the clearer the distinction becomes between what is scientifically established and what is often misunderstood.
Want to read more?
Marinalg Statement on the Safety of Carrageenan (February 2024)
Who is MarinAlg International?
MarinAlg International is a global trade association supporting the interests of the seaweed-derived hydrocolloids industry, including farmers, hydrocolloid suppliers, and product manufacturers. They advocate and support the safety and world-wide use of hydrocolloids derived from seaweed in foods, pet food and animal feed, pharmaceuticals, cosmetics, and other applications
Marinalg International is fully committed to food safety. Marinalg International, the global association representing manufacturers of seaweed-derived hydrocolloids, has been responding to EFSA’s call for data since October 2018 while preparing the necessary technical and toxicological data to address gaps and questions as identified by EFSA and the European Commission. Marinalg members are continuously involved in the development of safe and innovative food ingredients based on sound science. As such, Marinalg is committed to addressing all outstanding requests and continues to work with the Commission and EFSA. Thus, substantial data has already been submitted to EFSA, and more is in preparation according to a project plan as shared with EFSA in September 2023. In the meantime, food manufacturers, retailers, and consumers can remain confident in the safety of carrageenan and processed Eucheuma seaweed.