Gellan Gum

ID: gellan_gum

Aliases: E418, gellan, microbial polysaccharide gellan

Type: compound

Route/form: oral food-additive polysaccharide; supplement-like NAFLD evidence is preclinical

Status: food_additive

Evidence level: preclinical

Best data tier: direct preclinical; adjacent early human

Support scope: human, non-human/mechanistic, review/regulatory

Source types: human_trial, in_vitro, preclinical, regulatory_safety

Linked sources: 4

Broad outcomes: Fat loss / metabolic health, Gut / immune / inflammation

Reading note: These are curation notes anchored to linked sources, not a clinical recommendation or protocol.

Targets / mechanism

• fermentable polysaccharide/prebiotic hypothesis
• gut-liver axis
• SCFA and microbiota-metabolite changes

Optimization domains

• gut health
• microbiome
• liver
• NAFLD
• metabolic
• prebiotic
• food additive

Research basis

• A mouse NAFLD study reports gellan gum improving hepatic markers, body-fat outcomes, and microbiota/metabolite patterns, with in vitro fermentation evidence for probiotic taxa support.
• Older human dietary-effects work and regulatory reviews make it relevant as a common food additive rather than an obscure research chemical.

Limits, risks, and missing evidence

• The NAFLD efficacy signal is preclinical; food-additive exposure levels may be far below experimental supplement-like doses.
• Gums can be poorly tolerated in some GI contexts and effects may depend on microbiome baseline and food matrix.

Risk flags

• preclinical only for nafld
• food additive context
• GI tolerability
• dose translation uncertain
• microbiome individual variability

Linked papers, labels, and reviews

1. Gellan gum prevents non-alcoholic fatty liver disease by modulating the gut microbiota and metabolites
   preclinical / pubmed_gellan_gum_nafld_microbiota_2022
   Mouse NAFLD and in vitro fermentation study reporting gellan-gum effects on gut microbiota, SCFAs/metabolites, liver inflammation, and lipid metabolism.
2. The dietary effects of gellan gum in humans
   human_trial / tandfonline_gellan_gum_human_dietary_effects_1988
   Older human dietary-effects/safety context for gellan gum exposure.
3. Re-evaluation of gellan gum (E 418) as food additive
   regulatory_safety / efsa_gellan_gum_reevaluation_2018
   EFSA food-additive safety review; useful for additive status and human exposure context rather than efficacy.
4. Metabolic profiles of oligosaccharides derived from four microbial polysaccharides by faecal inocula from type 2 diabetes patients
   in_vitro / pubmed_gellan_gum_oligosaccharide_fermentation_2021
   In vitro human-faecal-inocula fermentation study including gellan gum oligosaccharides and microbiome metabolite profiling.