{"id":"arsenic-urine-24h","name":"Arsenic, 24-Hour Urine","shortName":"Arsenic (24-h urine)","aliases":["Arsenic, Urine 24 Hr","Arsenic ug/24 h","Arsenic, Urine (24h)","24-Hour Urine Arsenic","Arsenic, 24 Hr, U","Arsenic w/Reflex, 24 Hr, U","Arsenic with Reflex, 24 Hour, Urine","Arsenic, 24 Hour, Urine","Arsenic 24 hr urine","Total Arsenic, 24 Hour Urine"],"abbreviations":[],"loinc":[{"code":"5587-1","primary":true},{"code":"34244-4","primary":false}],"specimen":"urine-24h","units":[{"ucum":"ug/(24.h)","display":"µg/24 h"},{"ucum":"nmol/(24.h)","display":"nmol/24 h"},{"ucum":"umol/(24.h)","display":"µmol/24 h"}],"referenceRanges":[{"population":"18+","low":null,"high":35,"unit":"ug/(24.h)","unitDisplay":"µg/24 h","note":"Mayo Clinic Laboratories prints <35 µg/24 h for adults 18 and older and has not set a range for people under 18. This is total arsenic, so it includes the mostly harmless arsenic in seafood and seaweed. Most arsenic from a low-level dose leaves in the urine within a few days (ATSDR), so the result reflects recent exposure. The range does not apply to urine collected after a chelating medicine (a \"provoked\" test). Other labs can use different limits, and the range printed on your own report is the one that applies to your result.","sources":[{"title":"Arsenic with Reflex, 24 Hour, Urine (Mayo test ASU24)","url":"https://www.testcatalog.org/show/ASU24","publisher":"Mayo Clinic Laboratories (catalog mirrored at testcatalog.org)"},{"title":"Heavy Metals Screen, with Reflex, 24 Hour, Urine (Mayo test HMU24)","url":"https://www.testcatalog.org/show/HMU24","publisher":"Mayo Clinic Laboratories (catalog mirrored at testcatalog.org)"},{"title":"Arsenic Toxicity: Clinical Assessment (Case Studies in Environmental Medicine)","url":"https://web.archive.org/web/20231205014355/https://atsdr.cdc.gov/csem/arsenic/clinical_assessment.html","publisher":"ATSDR (archived copy)"},{"title":"Arsenic Toxicity: Biologic Fate (Case Studies in Environmental Medicine)","url":"https://web.archive.org/web/2023/https://www.atsdr.cdc.gov/csem/arsenic/biologic_fate.html","publisher":"ATSDR (archived copy)"},{"title":"Recommendations for provoked challenge urine testing","url":"https://pubmed.ncbi.nlm.nih.gov/24113861/","publisher":"Journal of Medical Toxicology","year":2013}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The total arsenic your body cleared in urine over a full day, a standard way to check for recent arsenic exposure.","url":"https://bloodtesttracker.com/markers/arsenic-urine-24h","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}