Polysorbate 80 is an additive used in processed foods as an emulsifier.
Some animal studies have demonstrated intestinal inflammation from consumption of polysorbate 80. This could contribute to obesity related intestinal inflammation, liver dysfunction and changes in gut microbiota.
Code of Federal Regulations Title 21https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm?fr=172.840
Food Additive P-80 Impacts Mouse Gut Microbiota Promoting Intestinal Inflammation, Obesity and Liver Dysfunctionhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4944853/