IgA and IgG have the potential to retard streptococcal growth; streptococcus mutans is highly susceptible to the bactericidal
action of lactoferrin, a major component of human milk.9, 10 Rugg - Gunn reported that cariogenic bacteria may not be able to utilize lactose, the sugar found in breastmilk, as readily as sucrose.8 Confirming the findings of other researchers, this author has evaluated approximately 600 skulls to find little evidence of problems with dental decay among our prehistoric breastfed ancestors.11, 12,13,14,15