Recently, studies have proven the anticarious effect is due to a substance called casein phosphopeptide (Prestes et al., 2013). Casein Phosphopeptides contain the amino acid sequence Ser-ser-ser-glu-glu and form casein nanoclusters with amorphous casein phosphate (ACP) (Farooq et al., 2012), providing a reservoir of phosphate and calcium thus sustaining the constant supply of these ions to the intraoral environment (Cochrane & Reynolds 2012). According to Reynolds et al., 2003, CPP-ACP has the ability to remineralize demineralized lesions, (Iijima et al,.2004) and can bind to plaque in the mouth resulting in a deposit of ACP on the tooth(Reynolds et al,. 1995);(Rose., 2000).
This remineralized enamel then has been thought to be somewhat more acid resistant in comparison with tooth enamel which has not been remineralized by CPP ACP (Yengopal, V., & Mickenautsch, S. 2009).CPP-ACP can prevent integration of streptococcus and streptococcus sobrinus into the plaque biofilm (Rose, 2000), and can interfere with the normal reproduction of the bacteria due to the calcium saturation