What is the PSMF Diet? A Deep Dive into the Protein-Sparing Modified Fast
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3 min read
First introduced in the 1970s, the protein-sparing modified fast (PSMF) is a structured, very-low-calorie diet designed for rapid weight loss under medical supervision. This specialized dietary approach has been studied extensively in adult populations and has proven effective for significant, short-term fat reduction while minimizing the loss of lean muscle mass.