The common beverage green tea is highly effective at killing a specific oral bacteria, *Fusobacterium nucleotum*. This particular bacteria has been scientifically linked to accelerating tumor growth in colorectal and breast cancer, providing a specific mechanism for green tea's health benefits.

Not flossing allows harmful, inflammation-loving microbes to thrive in your gums. These microbes can travel from the mouth to the brain, triggering inflammation that significantly increases the risk of developing dementia, according to new research.

Despite beets' reputation for improving performance via nitric oxide, modern agriculture has left them nutrient-depleted. An individual cannot realistically eat enough beets to gain a significant nitrate benefit. Furthermore, using mouthwash or fluoridated water negates any potential effect, rendering most beet consumption and supplementation useless.

Many whitening toothpastes work by being highly abrasive, effectively 'exfoliating' the tooth's surface. Overuse can erode the outer enamel layer, exposing the naturally yellower dentin underneath. This can lead to increased sensitivity and the opposite of the intended whitening effect.

Rinsing your mouth with water after brushing removes beneficial ingredients like fluoride that protect your teeth, much like showering after applying sunscreen. Instead, you should only spit out excess toothpaste to leave a protective coating on your teeth.

Specific mouth bacteria are consistently found in the brains of Alzheimer's patients and in clots from heart attacks. While not a proven root cause, these bacteria may contribute to age-related diseases. Regular flossing controls these bacterial populations by removing their food source, potentially lowering your risk of these conditions.

The instinct to brush after consuming sugary or acidic foods is harmful because it mechanically grinds damaging substances into your tooth enamel. It is better to wait 30 minutes or chew sugar-free gum to neutralize saliva before brushing.

Gum disease (periodontitis) is a significant risk factor for dementia, as harmful bacteria can enter the bloodstream and contribute to brain inflammation. Studies show that xylitol, found in certain gums and mouthwashes, improves the oral microbiota by inhibiting these specific harmful bacteria, offering a low-risk preventative measure.

Exercise improves cardiovascular health by stimulating nitric oxide production, which dilates blood vessels. Antiseptic mouthwash kills the oral bacteria essential for this nitric oxide pathway. Consequently, using mouthwash after a workout can completely reverse the blood pressure-lowering and cardiovascular benefits gained from exercise.