TY - JOUR T1 - Polyethylene glycol 4000 as a continuously administered non-absorbable faecal marker for metabolic balance studies in human subjects JF - Gut JO - Gut SP - 654 LP - 660 DO - 10.1136/gut.12.8.654 VL - 12 IS - 8 AU - R. Wilkinson Y1 - 1971/08/01 UR - http://gut.bmj.com/content/12/8/654.abstract N2 - The use of polyethylene glycol 4000 as a non-absorbable, continuously fed faecal marker is described. The intestinal handling and transit of polyethylene glycol is compared with that of chromium sesquioxide and barium sulphate. Polyethylene glycol is an acceptable non-absorbable faecal marker for calcium, phosphorus, and fatty acids, and has several features which commend its use in preference to insoluble chromium sesquioxide and barium sulphate particularly when marking water-soluble dietary constituents. ER -