Library.

“Eating breakfast is not necessary for human health.”

Breakfast is not universally required to maintain health. Randomized evidence does not show consistent broad harm from skipping it, while adverse associations found in observational studies may partly reflect overall diet, lifestyle, and socioeconomic differences. Individual nutritional needs and some cardiometabolic markers can still make breakfast beneficial for particular people.

“Brushing teeth before breakfast is more beneficial for dental health than brushing after breakfast.”

Most major dental organizations and professionals, including the ADA and AAE, recommend brushing before breakfast to remove overnight bacteria and coat teeth with fluoride before acid exposure. However, the claim overstates the certainty: the only peer-reviewed comparative study found post-breakfast brushing reduced cavity-causing bacteria more effectively (though it was preliminary), and the advantage of pre-breakfast brushing is largely conditional — post-breakfast brushing is mainly problematic only if done immediately after acidic foods. The preference is real but not as clear-cut as the claim suggests.