Biochemistry Thiamine deficiency causes decreased energy production because? A It is required for the process of transamination B It is co-factor in oxidative reduction C It is co-enzyme for transketolase in pentose phosphate pathway D It is co-enzyme for pyruvate dehydrogenase 💡 Explanation Thiamine deficiency causes decreased energy production because? ✓ Correct Answer: D. It is co-enzyme for pyruvate dehydrogenase