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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The most important source of reducing equivalents for fatty acid synthesis in the liver is
assistant
The correct answer is  HMP pathway 

The main source of NADPH for lipogenesis is the pentose phosphate pathway: PPP (also called the hexose monophosphate pathway: HMP).