Off Label · Issue 06 · October 13, 2026
The 5 minute routine your dentist never fully explained
Your mouth is the front door to your gut. Plus the bathroom product that can nudge your blood pressure up.
Hey there!
Your mouth is not a sealed off compartment. You swallow about a liter and a half of saliva a day, and its bacteria travel all the way down your gut. Bleeding gums give bacteria a direct path into your bloodstream. And the bugs on your tongue help your body make nitric oxide, which keeps your blood vessels relaxed.
Here's the routine I actually follow, and why.
1. Brush twice a day, and hit the spots you're missing
A typical brushing removes only about 42% of plaque. When researchers filmed people brushing, they spent 27 seconds on the inner surfaces versus 72 on the outer ones.
So angle the brush behind your back two teeth and give the inner surfaces real time. Two minutes, soft brush. Night is the one that matters most, because saliva, your mouth's natural rinse, drops dramatically while you sleep. And spit, don't rinse, so the toothpaste keeps working.
It's not just about teeth. In a study of nearly 250,000 adults, each additional daily brushing was associated with a 9% lower risk of major cardiovascular events.
2. Swish and swallow water when you wake up
A small habit I picked up from Andrew Huberman's oral microbiome episode. A 2019 study of 470 people found that oral bacteria routinely travel to and settle in the gut, even in healthy people. Your gut microbiome starts in your mouth. This one is low stakes, mostly rehydrating a mouth that dried out overnight, but it's a good reminder of why the rest of this list matters.
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3. Scrape your tongue (gently)
Your tongue is where most bad breath comes from. In a small head to head trial, a scraper cut the sulfur compounds behind bad breath by 75%, versus 45% for a toothbrush. One or two medium pressure passes, once or twice a day. No need to go to war with it.
4. Floss, and here's the Alzheimer's connection
Porphyromonas gingivalis is a key bacteria behind gum disease. A 2019 paper in Science Advances found its toxic enzymes in 96% of the Alzheimer's brains examined, and the levels tracked with tau, a hallmark protein of the disease. In mice, infecting the mouth put the bacteria in the brain.
In a Taiwanese cohort, 10+ years of chronic gum disease came with about 1.7 times the risk of Alzheimer's. This isn't settled science yet, but gum health is a plausible, modifiable risk factor that costs you two minutes a day.
Use whatever you'll actually use. A water flosser matches or beats string floss for gum bleeding in head to head trials. If you use string floss, skip PTFE floss like Oral-B Glide. It's made from a "forever chemical" polymer, and Glide users had about 25% higher blood levels of one PFAS compound in a 2019 study. Silk or non-PTFE floss is the easy swap.
5. Tape your mouth at night (if you're the right candidate)
Nasal breathing filters and humidifies air and delivers nitric oxide from your sinuses. Mouth breathing at night dries your mouth out and makes it more acidic, exactly the environment cavity and gum bacteria love. In a 2022 study of mouth breathers with mild sleep apnea, one week of taping cut snoring by more than half.
Do not tape if you can't breathe comfortably through your nose, you snore loudly or might have sleep apnea (get a sleep study, not tape), you have nighttime reflux, or you've been drinking. Never on kids. Use gentle, porous tape and try it awake for an hour first.
A few more tweaks
- Skip the daily antiseptic mouthwash. It wipes out the tongue bacteria that turn the nitrates in greens and beets into nitric oxide. One week of chlorhexidine cut oral nitrite production by 90% and nudged blood pressure up 2 to 3.5 points. If you love a rinse, go alcohol free and gentle, or use salt water.
- Fluoride toothpaste is fine. I still switched. Fluoride toothpaste has decades of evidence behind it. My concern is more with continuous ingestion through drinking water. I use a hydroxyapatite toothpaste, the same mineral your enamel is made of. It matched fluoride in an 18 month trial, but fluoride's track record is much deeper, so if cavities are your main concern, fluoride still wins.
- If you chew gum, make it xylitol. Cavity causing bacteria can't use xylitol for fuel, and chewing gets saliva flowing. Check the label: plenty of "with xylitol" gum still has aspartame or sucralose. Look for xylitol as the first ingredient.
The whole routine
- Morning: swish and swallow, scrape your tongue, brush
- Night: floss or water floss, brush (the big one), spit don't rinse, tape if you're a candidate
- Skip: daily antiseptic mouthwash and PTFE floss
If your gums bleed when you brush or floss, that isn't normal, it's inflammation, and it's worth a dentist visit. This is education, not medical advice.
Stay healthy, Clay Moss, MD
P.S. My 2027 waitlist for private patients is open. If you want a plan built around your labs and your goals, request a spot here.