GLOSSARY

Microbial Conversion of Bile Acids covers multiple reactions, requiring the reaction and resulting substance to be specified.

Microbes can remove glycine or taurine conjugates from bile acids and convert some primary forms into secondary forms; these are separate reactions. Bile salt hydrolase contributes to deconjugation, not single-handed production of every secondary acid. Identity and amount influence signaling and the intestinal environment. More of a microbial activity does not automatically benefit fat absorption or sport, and the whole bile-acid profile matters beyond one enzyme name.

Primary bile acids are made in the liver; intestinal microbes can convert them into secondary forms. Conjugation with glycine or taurine produces conjugated species, while bile-salt terminology concerns ionic forms and counterions. These related terms should not be presented as unrelated nutrients. Pool size and composition reflect synthesis, recycling and loss rather than a separate dietary requirement for every named form.

Much intestinal bile acid is reabsorbed, particularly in the terminal ileum, and returns through portal blood to the liver. Enterohepatic cycling enables reuse rather than complete disposal and replacement after every meal. Terminal intestinal disease or surgery can disrupt this cycle. Symptoms and fat absorption then need clinical assessment; the mechanism does not imply that healthy athletes should routinely replace bile acids with supplements.