Biochemistry General 178f5727 Which of the following is not a co-factor for pyruvate dehydrogenase complex A Thiamine pyrophosphate B FAD C NAD D Biotin High-Yield Explanation Cofactor for PDH complex are: Thiamine pyrophosphate (Vit B1), FAD (Vit B2), NAD (Vit B3), CoA (Vit B5), Lipoic acid.