Carrageenan

Studies in people

• No harm found

  Cancer risk in people²

  Studies in people observed no cancer or tumors linked to carrageenan.

• Concern

  Blood sugar control³

  In people, carrageenan lowered blood sugar control in those who were overweight, but not in others.

Animal and lab studies only

• Concern

  Inflammation evidence gap⁵

  In animal and lab studies, carrageenan triggered inflammation, but evidence in people is not yet definitive.

• Concern

  Gut health and inflammation⁶

  In animal studies, degraded carrageenan triggered gut ulcers, changed gut bacteria, and made the gut lining more leaky.

• Concern

  Gut inflammation in mice⁷

  In animal studies, carrageenan made gut inflammation worse in mice that already had it.

• Concern

  Gut lining and protein digestion⁸

  In lab studies, carrageenan interfered with protein breakdown and weakened the gut lining, but it is unclear if this happens in people.

• Concern

  Gut inflammation in Crohn's disease⁹

  Carrageenan raised inflammatory signals in gut cells from Crohn's patients, especially when inflammation was already present.

Study type not stated

• Open question

  Gut health and digestion⁴

  More research is needed to know if carrageenan affects digestion, gut bacteria or inflammation in people.

The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least two findings in people. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.