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More recently, independent researchers also reported that a GLP-1 drug reversed age-related molecular changes across multiple organs in aging mice and improved several measures of physical function, even at doses that produced little change in body weight

The mechanism involves glycine exerting a hyperpolarizing effect on macrophages and other immune cells, inhibiting calcium influx through voltage-sensitive channels and thereby dampening their inflammatory activity

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Instead, their decreased food purchases are disproportionately concentrated in processed foods and sugar-sweetened beverages, further underscoring the shift in food preference induced by GLP-1R-based treatments (Dilley et al., 2025)

This initial dose establishes baseline tolerance