In the lab, adult teeth soaked in white wine for a day had a loss of both calcium and another mineral called phosphorus to depths of up to 60 micrometers in the enamel surface, which the researchers say is significant.
The effect is pH-mediated, and is most noticeable with Riesling wines, and was exacerbated by brushing the teeth soon after drinking wine. Red wines were noted to be much less damaging to teeth, and the researchers suggest that the deleterious effect of white wine might be mitigated by the ingestion of calcium-rich cheese.
BBC link. Photo: Bacchus (Caravaggio)