Sodium carboxymethylcellulose (cellulose gum)

Cellulose gum has a long history of food use, but newer studies raise questions about its effects inside the gut. In a controlled study, seven adults received 15 grams daily for about eleven days and showed gut-community and metabolite changes plus modest post-meal discomfort, without detected overt inflammation. A later trial tested 2.75 grams daily for four weeks in a small group within a six-arm study. It reported lower short-chain fatty acids but no inflammatory, permeability or metabolic harm; the full report was unavailable for detailed checking.

A large French cohort associated estimated intake with small increases in cardiovascular and coronary disease that survived statistical checks. Estimated exposure, possible confounding and absent independent replication limit causal interpretation. Mouse studies report inflammatory, metabolic and offspring effects, although other experiments did not reproduce inflammation and a recent unreviewed study found benefit in a different colitis model. Rare food-associated allergic reactions are documented, without establishing their frequency.

Traditional assessments found no general-population concern at reported uses, but that does not resolve every newer gut finding. The EU will remove specified infant and young-child medical-food permissions in April 2027 because adequate safety data were missing. General-food uses remain permitted. The review considers credible signals whose clinical meaning and relevance to usual intake remain uncertain.

Research reviewed on September 5, 2026 · 12 sources