You really should not start baby-led weaning at 4 months. A lot of the research conducted has determined that 4 months old is much too young for a baby to start eating table foods. Rather, it is recommended that a baby’s diet continues to solely be made up of milk until he or she is 6 months old. Note: Try not to wait much longer than 6 months old to introduce solids. Six months old is the recommended age for introducing baby-led weaning (or any type of weaning for that matter) because the previously mentioned milestones generally happen around this time, and also, a baby's body often requires more nutrients than what mother’s milk or formula can supply around this age.