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Contributor Information Michael Colwill, Department of Gastroenterology, St Georges University Hospital NHS Foundation Trust, London, United Kingdom

This occurs because the underlying insulin resistance and beta-cell dysfunction remain unchanged

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Int J Epidemiol 44:82736

The reality across all these products is that the skin barrier effectively blocks peptides larger than 500 Daltons from absorption, making their weight loss claims scientifically implausible

This requires risk-stratified prescription strategies targeting individuals with the greatest risk of complications or those most likely to benefit based on predictive biomarkers