Cutaneous blood-sugar curves after the administration of fructose, mannose and xylose

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Abstract
The separation of glucose from fructose or mannose in small amounts of cutaneous blood has been effected by the use of a special strain of Proteus vulgaris. After the oral administration of fructose, mannose or xylose, an increase in blood glucose can be found only after fructose. Fructose is found only in small amounts in the blood, thus confirming previous investigators. Mannose was undetectable in the blood stream, though it was found in the urine. Even after the ingestion of 10 gm. of xylose, the blood xylose does not fall to zero in 2 hrs. Fructose and galactose may give rise to hyperglycemia as a result of the production of some intermediary glucose-precursor.