Barium Test

Barium occurs naturally in soil and water and is used in industrial applications and medical imaging contrast agents. Soluble forms of barium are toxic and interfere with potassium balance, which is critical for muscle contraction and heart rhythm.

After ingestion, barium is absorbed from the gut and excreted primarily in urine. Elevated urine levels indicate recent exposure, often from contaminated water or occupational sources. High exposure can cause muscle weakness, cramps, and dangerous heart rhythm abnormalities due to disrupted electrical signaling.

Low urine levels suggest minimal exposure. Because barium does not significantly accumulate long term, urine testing is most useful for detecting ongoing exposure.