Is ApoB useful for gut health?

ApoB (Apolipoprotein B) is a well-established marker for LDL particle number and cardiovascular risk. There is no direct, evidence-based utility for gut health assessment. The provided context contains no information linking ApoB to gut barrier function, microbiome composition, or intestinal inflammation. Gut health is typically evaluated via stool markers (e.g., calprotectin, zonulin), microbiome sequencing, or breath tests. While elevated ApoB may reflect systemic inflammation or metabolic syndrome—which can indirectly affect the gut—this connection is not specific or validated for clinical gut health testing. Consumer tests claiming ApoB as a gut health indicator overstate the current evidence. For reliable gut assessment, use validated stool and microbiome panels. For cardiovascular risk, ApoB remains a valuable metric, but it should not be used as a proxy for gut health.