A silbing comment mentions some causes such as over-cleanliness and c-section, but other more detrimental effects may be lack of breast milk in infancy and anti

A silbing comment mentions some causes such as over-cleanliness and c-section, but other more detrimental effects may be lack of breast milk in infancy and antibiotics use (particularly as a toddler/infant). Some other supporting causes may be things like overuse of antibiotics in meat production and lack of fermented food in diet.