It is recommended to wait approximately 30 minutes after consuming acidic or sugary foods or drinks before brushing your teeth, in order to avoid damaging enamel weakened by acidity.

noli's read

This advice is based on the principle of protecting enamel, the tooth's protective layer. After consuming acidic foods, the oral pH drops, which can temporarily soften the surface of the enamel. Research in cariology (notably Attin et al., Caries Res.) suggests that immediate brushing could then accelerate the mechanical wear of this weakened layer. However, this recommendation is nuanced within the scientific community: some experts emphasize that the preventive action of brushing against cavities remains a priority for the majority of the population. The idea of a systematic waiting period is therefore sometimes considered a useful precaution primarily for individuals suffering from severe dental erosion. There is no absolute consensus requiring this wait for everyone, but the approach is generally recognized as prudent and consistent with oral physiology.

the sources

No named source held this one up — that absence is part of the verdict.