INS and diabetes mellitus: 34 Gao Gao Z Z Yin Yin J J Zhang Zhang J J Ward Ward RE RE Martin Martin RJ RJ Lefevre Lefevre M M Cefalu Cefalu WT WT Ye Ye J J Butyrate improves insulin sensitivity and increases energy expenditure in mice Butyrate improves insulin sensitivity and increases energy expenditure in mice Diabetes Diabetes 2009 2009 58 58 1509 1509 1517 1517 19366864 19366864