Polysorbate 80 and gut lining damage in lab-grown human cells
What it found
Polysorbate 80 damaged the gut lining and triggered inflammation in lab-grown human intestinal cells.
These effects started at very low concentrations.
What they found
Animal and lab studies
Cell damage at low doses
Both polysorbates caused human gut cells to burst open in all three lab models. This happened at concentrations starting from 0.1%.
Weakened gut barrier
The gut lining barrier broke down when exposed to either additive. Electrical resistance dropped, more material leaked between cells, and the proteins holding cells together looked irregular in lab tests.
Inflammation below damage level
At 0.05%, a level too low to directly kill the cells, genes and proteins linked to inflammation and stress became more active in the lab-grown human cells.
Specific inflammatory signals
Polysorbate 80 increased several inflammatory chemical signals in the cells, including CXCL1, CXCL8 (IL-8), CXCL10, and LIF. Polysorbate 20 raised others like CXCL5, CXCL10, and VEGFA.
What the authors conclude
- They say this work gives direct proof that polysorbate 80 and polysorbate 20 harm the gut lining in their lab models.
- They explain that cell death drove the barrier damage at concentrations between 0.1% and 1%.
- They note that even below 0.1%, these additives sparked an inflammatory response, which they suggest could be bad for gut health.
How it was done
Many long-term illnesses linked to a leaky gut barrier have become more common as food emulsifiers are used more widely. The authors wanted to see how these additives affect gut cells.
They grew human intestinal cells in the lab using three different models, including tiny organ-like structures made from stem cells. They exposed these cells to polysorbate 20 and polysorbate 80. They then measured cell damage, barrier strength, gene activity, and protein levels.
What it can’t tell you
- We summarised it from the abstract only.
- These tests used lab-grown human cells rather than whole living bodies. They cannot show what happens when someone eats food containing polysorbate 80.
- The concentrations tested in the lab may not match what actually reaches the gut lining after digestion.
Who paid
- Authors work at
- University of Zurich, Switzerland; Marmara University, Turkey; Stanford University School of Medicine, USA
The paper
- Title
- Mechanisms of gut epithelial barrier impairment caused by food emulsifiers polysorbate 20 and polysorbate 80
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Abstract only
- Cite
- Ogulur I, Yazici D, Pat Y, et al (2023). Mechanisms of gut epithelial barrier impairment caused by food emulsifiers polysorbate 20 and polysorbate 80. Allergy. doi:10.1111/all.15825PubMed 37530764DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error