Interesting forward from my facebook page. I had to go look up dental caries (seems its soft or 'weak' spots in your teeth). So, another urban myth stands up.
Milk and cheese
Cows' milk contains the sugar lactose - the least cariogenic (decay-causing) sugar. Milk on its own doesn't promote caries and this has been attributed to the presence of protective factors: calcium, phosphate, and the milk protein casein.
Cheese protects against dental caries, partly because eating cheese causes more saliva to flow and neutralise acids, and partly because the cheese increases calcium concentration in the plaque stopping demineralisation. The fat in cheese also reduces the amount of bacteria on the surface of the teeth. So a small lump of cheese eaten after a meal or a sugary/acidic drink will help protect tooth enamel.
http://www.bbc.co.uk/health/treatments/healthy_living/nutrition/dietary_dental.shtm
