The acidogenic and cariogenic potential of plain and supplemented huma
n and bovine milk was determined by pH tests and with intra-oral exper
iments, Human milk produced a lower pH than bovine milk and bovine mil
k with a 2% lactose supplement. Human milk caused greater softening of
enamel than bovine milk in the intra-oral tests. This could be modifi
ed by supplementing with calcium and phosphorus to the levels present
in bovine milk.