Biochemistry Which of the following enzyme activities can be used to help diagnose riboflavin deficiency? A RBC transketolase B RBC glutathione reductase C Branched chain ketoacid dehydrogenase D RBC transaminase 💡 Explanation Which of the following enzyme activities can be used to help diagnose riboflavin deficiency? ✓ Correct Answer: B. RBC glutathione reductase