Carter SA, Parsons CM, Robinson SM, et al. - This study intended to investigate the impact of infant milk feeding on bone health in later life by analyzing the impact of breastfeeding and bottle feeding on the lumbar spine and femoral neck bone mineral content (BMC) and BMD applying data from the Hertfordshire cohort study (HCS). Between 1931 and 1939, information about infant milk feeding, birth weight (kg) and weight at 1 (kg) was obtained by health visitors in Hertfordshire. Between 1998 and 2004, BMC and BMD measurements were taken by the DXA scan. In males, infant milk feeding was significantly correlated with lumbar spine BMD. It was noted that, on average, males who consumed breastmilk alternatives in infancy had lower lumbar spine BMD measurements in comparison with those who were fed only breastmilk. No significant associations were found between infant milk feeding and bone health for females. In this study, significant relationships between infant milk feeding and lumbar spine BMD in males show that breastmilk may be protective for the bone health of male babies. For males and females, the data displayed here underscores the potential lifelong advantages of breastfeeding and may highlight the differences between osteoporotic risk factors.