Effect of Five Dietary Emulsifiers on Inflammation, Permeability, and the Gut Microbiome: A Placebo-controlled Randomized Trial.
Wellens J, Vanderstappen J, Hoekx S, Vissers E, Luppens M, Van Elst L · Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association · 2026
Dietary emulsifier consumption might promote intestinal inflammation, eventually leading to inflammatory bowel diseases. However, human data are scarce and involve a limited number of emulsifiers. We studied the effects of an emulsifier-free diet (EFD) and specific emulsifier supplementation.
Sixty healthy participants followed an EFD for 2 weeks. Then, using a randomized placebo-controlled trial design, participants continued an EFD for 4 weeks with the addition of either carboxymethyl cellulose, polysorbate-80, carrageenan, soy lecithin, native rice starch, or no additives administered through brownies. Effects on cardiometabolic markers, gut microbiota, intestinal inflammation, and permeability were explored.
After 2 weeks of an EFD, cholesterol levels decreased (P = .00006). Under emulsifier supplementation, alpha diversity remained stable, yet microbial composition was affected by treatment and visit. Compared with placebo, concentrations of all short chain fatty acids were lowe