Multiple clinical surveys, in vitro trials, and reviews indicate that the consumption of acidic citrus fruits and juices contributes to dental enamel erosion and decreased microhardness, though individual dietary habits and oral hygiene play mediating roles.
The claim is that consumption of citrus fruits causes dental enamel erosion. Multiple retrieved papers provide direct in vitro and clinical evidence showing that citrus juices and acidic fruits reduce enamel microhardness, alter surface morphology, and correlate with clinical signs of tooth wear or erosion. One paper found no significant association with citrus, but the overwhelming body of experimental and observational evidence supports the causal relationship between acidic fruit consumption and enamel erosion.