In a cross-sectional analysis of 6,790 adults aged 50 and older across two Irish cohorts, researchers found no consistent association between fermented dairy consumption and muscle strength, physical function, or frailty after accounting for lifestyle and socioeconomic factors. Although one analysis linked higher fermented dairy intake to greater odds of low grip strength, other findings did not support this association, and the researchers emphasized the need for further studies to establish whether fermented dairy influences healthy muscle aging.