Does a common food additive make overweight people more prone to diabetes?
Carrageenan and insulin resistance in humans: a randomised double-blind cross-over trial
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Carrageenan increased inflammation and insulin resistance in overweight men — but didn’t change their gut bacteria at all.
Most people assume food additives harm health by disrupting the microbiome — this study proves it can happen without touching bacteria, directly through immune activation and gut barrier damage.
Practical Takeaways
If you’re overweight or prediabetic, check labels for carrageenan (E407) in dairy alternatives, plant milks, ice cream, and processed meats — and consider switching to carrageenan-free versions.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Carrageenan increased inflammation and insulin resistance in overweight men — but didn’t change their gut bacteria at all.
Most people assume food additives harm health by disrupting the microbiome — this study proves it can happen without touching bacteria, directly through immune activation and gut barrier damage.
Practical Takeaways
If you’re overweight or prediabetic, check labels for carrageenan (E407) in dairy alternatives, plant milks, ice cream, and processed meats — and consider switching to carrageenan-free versions.
Publication
Journal
BMC Medicine
Year
2024
Authors
R. Wagner, J. Buettner, M. Heni, L. Fritsche, S. Kullmann, Moritz Wagmüller, A. Peter, Hubert Preissl, J. Machann, Reiner Jumpertz von Schwartzenberg, Andreas L. Birkenfeld, U.-F. Pape, Gerrit van Hall, Peter Plomgaard, Hans-Ulrich Häring, A. Fritsche, Kelsey N. Thompson, Reinhild Klein, N. Stefan
Related Content
Claims (6)
If you have a higher body weight (BMI 27 or more), taking a common food additive called carrageenan for two weeks might make your body less responsive to insulin — and this effect is stronger the more body fat you have, compared to not taking it.
Eating carrageenan, a common food additive, might make your gut leakier, letting harmful stuff from your intestines escape into your bloodstream and cause long-term swelling in your body.
Eating carrageenan (a common food additive) every day for two weeks might trigger your immune system to act up, making certain immune cells more active and raising signs of inflammation in your blood — especially if you're overweight.
Eating carrageenan — a common food additive — doesn’t change the types of bacteria in the gut of healthy young men after two weeks.
If young, non-obese men take 500 mg of carrageenan every day for two weeks, their gut might become more leaky, which you can tell by higher levels of certain substances in their urine and blood.