Nathan Bryan: Nitric oxide, blood flow, and what actually raises it
Why boosting nitric oxide may be more about daily habits than supplements
What this episode covers
- Nitric oxide is a gas your body makes to relax blood vessels and control blood flow.
- Low levels are linked to high blood pressure, poor circulation, and low energy.
- Diet, exercise, and nasal breathing may support it, while antiseptic mouthwash and some habits may lower it.
Confidence in this episode
Everything about how much to believe this episode, in one place.
The core biology of nitric oxide is well established, but the bigger disease-cure claims rest on mechanisms and small studies rather than large human trials.
- Nitric oxide relaxes blood vessels and helps control blood flow.
- Dietary nitrate from vegetables can raise nitric oxide and may lower blood pressure.
- Antiseptic mouthwash can reduce nitric oxide made by mouth bacteria.
- That nitric oxide deficiency is the root cause of diabetes or Alzheimer's.
- That nitric oxide products prevent or cure chronic disease.
- That long-term acid-reflux drugs cause heart attacks and dementia.
Why it matters
Many people reach for arginine or beet supplements to boost nitric oxide. This episode argues those often do little, especially for people who are already unwell. Nitric oxide touches blood pressure, circulation, energy, blood sugar, and sexual function. Supporting it through diet and daily habits may contribute to healthier blood flow. For some people, that may mean better blood pressure, exercise tolerance, or energy.
What stands out
- In one product analysis cited by the speaker, about 95% of tested beet supplements contained little measurable nitrate (product testing).
- A clinical trial in people recovering from a heart attack was stopped early because the high-dose arginine group had worse outcomes (double-blind RCT).
- Antiseptic mouthwash kills the mouth bacteria that turn dietary nitrate into nitric oxide, which may raise blood pressure (human studies).
Best-supported action
The single highest-leverage move from this episode, anchored in the strongest evidence the speaker presents.
Eat a large serving of nitrate-rich greens (spinach, arugula, or beetroot) every day for four weeks.
Where to start
Small low-friction starters covering the main moves from this episode.
- Breathe through your nose rather than your mouth when you can.
- Go easy on sugary and highly processed foods.
Other supported actions
Further actions discussed in this episode, ordered from strongest to weakest evidence. This is one expert's view, the full topic compares and ranks across experts.
- Eat a nitrate-rich vegetable such as spinach, arugula, or beetroot at one meal every day.Moderate evidence
- If you use antiseptic mouthwash daily, ask your dentist whether limiting it to short courses would still meet your dental needs.Moderate evidence
- Do 4 to 5 minutes of high-intensity intervals most days, such as brisk stair or hill efforts.Moderate evidence
Full context, impact ratings, and timing — available in related topics
Questions to take to your doctor
- Given my blood pressure, would eating more nitrate-rich greens be a sensible addition to what I already do?
- Given I take a daily acid-reflux medication, is it worth reviewing whether I still need it, rather than stopping on my own?
- Given my heart history, are arginine or nitric oxide supplements safe for me, or better avoided?
Full doctor prep with ranked questions available in the full topic page
Context
Articulates mainstream nitric oxide biochemistry (oral microbiome conversion, age-related decline, dietary nitrate pathway); also commercially associated with NO supplement products, so anti-mouthwash and anti-fluoride framing should be read with that context.
This episode does not prove that nitric oxide is the single root cause of heart disease, diabetes, or Alzheimer's. The strongest claims rest on mechanisms and small studies, not large trials showing these outcomes change. The speaker develops and sells nitric oxide products, which is worth knowing when weighing his recommendations. This does not mean you should stop or change any prescribed medication, including acid-reflux drugs, on your own. The everyday nitric oxide science holds up; the specific disease-cure claims do not.
Where people go wrong
- Buying arginine or beet supplements expecting a reliable blood-flow boost.Many products contain little usable nitrate, and high-dose arginine may harm people with heart disease.
- Stopping a prescribed acid-reflux medication on your own after hearing it may lower nitric oxide.Sudden stops can cause rebound symptoms; any change should go through your doctor.
What to expect over time
- First daysNitrate-rich meals and nasal breathing may modestly support blood flow; some people notice better exercise tolerance.
- First few weeksWith regular greens and exercise, blood pressure may edge down for some people.
- Longer termDurable benefits depend on steady habits; supplements alone rarely substitute for them.