{"id":"bile-acids-total","name":"Bile Acids, Total (fasting)","shortName":"Total bile acids","aliases":["Total Bile Acids","Serum Bile Acids","Bile Acids, Total","TBA","Bile Acids Total, Serum","Bile Acids, Fasting","Bile acids","Fasting bile acids","Ácidos biliares","Bile Acids, Total, S","Bile Salts, Total","Total Serum Bile Acids"],"abbreviations":["TBA","TSBA"],"loinc":[{"code":"14628-2","primary":true},{"code":"35562-8","primary":false},{"code":"1967-9","primary":false}],"specimen":"serum","units":[{"ucum":"umol/L","display":"µmol/L"},{"ucum":"nmol/mL","display":"nmol/mL"}],"referenceRanges":[{"population":"Adults","low":0,"high":10,"unit":"umol/L","unitDisplay":"µmol/L","note":"Mayo Clinic Laboratories prints 10 µmol/L or less and ARUP prints 0–10 µmol/L, both for fasting samples. In pregnancy, labs set their own upper limits: 17 of 33 UK maternity units in the PITCHES trial used 14 µmol/L, and the others used 10 to 13 µmol/L. Use the range on your own report first.","sources":[{"title":"Bile Acids, Total, Serum (test ID BILEA)","url":"https://www.testcatalog.org/show/BILEA","publisher":"Mayo Clinic Laboratories"},{"title":"Bile Acids, Total (test 0070189)","url":"https://ltd.aruplab.com/Tests/Pub/0070189","publisher":"ARUP Laboratories"},{"title":"Ursodeoxycholic acid versus placebo in women with intrahepatic cholestasis of pregnancy (PITCHES): a randomised controlled trial","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC6739598/","publisher":"The Lancet","year":2019}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Bile acids are made by the liver to digest fat. Their level in a fasting blood sample can rise when bile isn't flowing out of the liver normally.","url":"https://bloodtesttracker.com/markers/bile-acids-total","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}