Is HDL useful for gut health?

Whether HDL (high-density lipoprotein) is useful for gut health is not supported by strong evidence. HDL is best known for its role in reverse cholesterol transport and cardiovascular protection. Some animal and in vitro studies suggest HDL may influence the gut microbiome or intestinal barrier function via anti-inflammatory or antioxidant properties, but human data are scarce and inconsistent. No clinical guidelines recommend targeting HDL for gut health. HDL blood levels are influenced by diet, exercise, genetics, and metabolic status, and do not directly reflect gut microbiome composition. Claims that raising HDL improves gut health are largely speculative and not evidence-based. Caution: artificially elevating HDL (e.g., via certain drugs) has not shown benefit and may carry risks. In consumer testing, HDL is a standard lipid marker, but its relevance to gut health remains unclear. Further research is needed before any practical recommendations can be made.