Fructose and Fructolysis 147 



Conditions similar to those in experimental diabetes seem to 

 prevail also in man. In semen samples from diabetic patients we 



8 lO 12 



Weeks 



Fig. 14. Effect of diabetes and insulin on seminal fructose in rabbit. The 

 period of insulin treatment is indicated by arrows. Semen was col- 

 lected weekly. 



came upon fructose values which were well above the upper limit 

 of normal variations; diabetic values ranged from 650 to 1230 mg. 

 per 100 ml., and from 33-4 to 47-5 mg. per ejaculate. In a survey 

 of 150 specimens of normal human semen, Harvey (1948) found 

 11 



