“Hamsters receiving tranylcypromine plus 5-hydroxytryptophan had a higher plasma glucose concentration (266 ± 19 versus 116 ± 8 mg/dl), lower plasma insulin concentration (19 ± 3 versus 46 ± 8 μU/ml), and lower plasma insulin/glucose ratio (0.06 ± 0.01 versus 0.40 ± 0.06) than control hamsters.”
“When 5-hydroxytryptophan was given to hamsters after tranylcypromine administration , there was a 58-, 73-, 14-, and 10-fold increase in islet, pancreatic, anterior pituitary, and median eminence serotonin, respectively.”