Holloway W D, Tasman-Jones C, Lee S P
Am J Clin Nutr. 1978 Jun;31(6):927-30. doi: 10.1093/ajcn/31.6.927.
The digestion of cellulose, hemicellulose, and lignin has been investigated in humans. Two groups of subjects were studied--healthy subjects with an ileostomy and normal subjects. Both were put on a fixed diet of known cellulose, hemicellulose, and lignin content. From the feces excreted the fiber components were measured by the acid and neutral detergent method. From the small bowel 84.5% of the ingested cellulose was excreted from the ileostomy subjects. From the normal subjects 22.4% of the ingested cellulose was excreted, indicating approximately 80% of the cellulose was digested in the normal subjects. From the water insoluble ingested hemicelluloses 27.5% were excreted from the small bowel, 4.0% from normal subjects. That is approximately 96% digestion of the hemicelluloses in normal subjects. Lignin was found to be undigested in both the small and large bowel. This has important implications in future fiber research.
对人体中纤维素、半纤维素和木质素的消化情况进行了研究。研究了两组受试者——患有回肠造口术的健康受试者和正常受试者。两组受试者均采用已知纤维素、半纤维素和木质素含量的固定饮食。通过酸和中性洗涤剂法测量从粪便中排出的纤维成分。回肠造口术受试者从小肠排出了摄入纤维素的84.5%。正常受试者排出了摄入纤维素的22.4%，这表明正常受试者中约80%的纤维素被消化。从摄入的水不溶性半纤维素来看，从小肠排出了27.5%，正常受试者排出了4.0%。也就是说，正常受试者中半纤维素的消化率约为96%。发现木质素在小肠和大肠中均未被消化。这对未来的纤维研究具有重要意义。
