Brush your teeth immediately when you wake up. Overnight your mouth fills with acid-producing bacteria due to lower salivary flow. When you eat or drink carbs or sugars without brushing first, you feed this bacteria, which immediately producing acids, acidity increases beyond the tolerance threshold and immediately starts damaging  your enamel. Also, an epidemiological 2010 study linked poor oral hygiene to higher levels of systemic inflammation and  increased cardiovascular risk due to the spread of oral pathogens into the bloodstream. A 2020 nationwide study in Korea following 161,286 subjects for a median of 10.5 years found that frequent tooth brushing (3 or more times a day) significantly reduced the risk of atrial fibrillation and heart failure by an average of 10% and 12%, respectively. Source: Joshipura et al., 2009. BMJ. & Source: Lockhart et al., 2012. Circulation.