Carrageenan and gut inflammation in mice with induced colitis
What it found
In mice with chemically triggered gut inflammation, kappa-carrageenan made weight loss, death rates and colon damage worse.
It also shifted immune signals toward more inflammation.
What they found
Animal and lab studies
Weight loss and survival
Mice that received kappa-carrageenan before the inflammation trigger lost more weight and had higher death rates than those that did not get it.
Colon tissue damage
Tissue checks showed that kappa-carrageenan worsened the colon inflammation caused by the chemical trigger in these mice.
Immune cell changes
The proportion of certain regulatory immune cells was lower in mice given both kappa-carrageenan and the trigger compared to mice given only the trigger.
Inflammation signals
Kappa-carrageenan raised levels of several inflammatory proteins and lowered an anti-inflammatory protein in the mouse gut lining.
Oxidative stress markers
Enzymes that help handle oxidative stress worked less well in mice given kappa-carrageenan alongside the trigger. Other stress-related molecules increased.
What the authors conclude
- They conclude that kappa-carrageenan worsened chemically triggered gut inflammation in mice.
- They suggest this effect may be linked to oxidative stress and the activation of specific inflammatory pathways.
How it was done
Carrageenan is a common food additive used in many products. The authors wanted to see how one form of it affects the gut when inflammation is already present.
Mice were given kappa-carrageenan for 14 days before researchers triggered gut inflammation using a chemical called TNBS. They then measured body weight, survival, colon tissue changes and various immune markers.
What it can’t tell you
- We summarised it from the abstract only.
- These results come from mice with artificially triggered gut inflammation, so they cannot show what happens in healthy people eating carrageenan.
- Animal studies cannot prove that the same effects would occur in human guts.
Who paid
- Authors work at
- Ningbo University, PR China; Lihuili Hospital of Ningbo Medical Center, PR China; Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, PR China
The paper
- Title
- Enhanced effect of κ-carrageenan on TNBS-induced inflammation in mice
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Abstract only
- Cite
- Wei W, Feng W, Xin G, et al (2016). Enhanced effect of κ-carrageenan on TNBS-induced inflammation in mice. International immunopharmacology. doi:10.1016/j.intimp.2016.07.031PubMed 27494685DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error