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The British Dietetic Association listed the Sirtfood Diet among its top five "celebrity diets to avoid" in 2019, citing the extreme restriction in phase one and the lack of long-term evidence
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Le Large TYS, Bijlsma MF, Kazemier G, van Laarhoven HWM, Giovannetti E, Jimenez CR
Retrieved June 10, 2025, from Abosamak, N
Executive Summary Written by Jonathan Wright, British Clinical Pharmacist Last reviewed: February 2026 Glucagon-like peptide-1 (GLP-1) receptor agonists including semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro) have transformed the treatment of obesity and type 2 diabetes
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