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BackgroundThe phloroglucinol assay is the current method for d‐xylose determination in urine/plasma/serum. However, its sensitivity is limited when low amounts of d‐xylose are to be measured, such as in the noninvasive evaluation of intestinal lactase with 4‐galactosylxylose (gaxilose). An improved assay was therefore needed.
MethodsWe developed and validated a modified version of the phloroglucinol‐based...
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