How to Improve Blood Flow in Your Kitchen
In a Nutshell
Nitric oxide improves blood flow, lowers blood pressure, reduces inflammation, and prevents clots. You can increase it by avoiding mouthwash, breathing through your nose, humming, exercising regularly, eating nitrate-rich vegetables like beets and leafy greens, using extra virgin olive oil, and consuming 2g+ of omega-3s daily.
These notes were generated by AI and may contain inaccuracies.
Your body produces a molecule that can lower blood pressure, improve blood flow, boost athletic performance, reduce inflammation, and prevent blood clots. It keeps the 60,000 miles of blood vessels in your body healthy - a length long enough to circle the Earth twice. This molecule won the Nobel Prize in 1998 and is called nitric oxide (NO). You can increase nitric oxide for free using tools available in your kitchen, bathroom, or car.
Dr. Nick Norwitz has a doctorate in medicine and philosophy from Harvard and Oxford, with expertise in cardiovascular health. He teaches practical lifestyle strategies for heart care that were not taught in medical school.
Part 1 explains what nitric oxide is and why it matters. Part 2 covers two ways the body produces nitric oxide. Part 3 presents seven strategies to increase nitric oxide levels.
Nitric oxide is a signaling molecule composed of nitrogen and oxygen. It improves blood pressure, blood flow, athletic performance, inflammation, and blood clotting - making it one of the most important molecules for heart health.
Blood vessels are living tissue that can expand, shrink, and reshape. When exercising, the heart's output increases and blood flows rapidly, creating friction called shear stress on the inner lining of blood vessels. This activates nitric oxide synthase, which produces nitric oxide. Nitric oxide spreads from vessel lining cells to surrounding smooth muscle cells, allowing muscles to relax. When relaxed, blood vessels dilate, lowering blood pressure and improving blood flow.
Nitric oxide inhibits platelet activation and aggregation. Platelets stick together to form plugs that cause blood clots. Nitric oxide reduces inappropriate clot formation, protecting against heart attacks and strokes when arteries supplying the heart or brain become blocked.
As cardiovascular plaque builds in artery walls, particles on vessel linings catch inflammatory cells. Nitric oxide suppresses this process, reducing inflammatory cell invasion into artery walls. Nitric oxide also contributes to endothelial cell growth and migration during vascular remodeling. Blood vessels are like tree roots, and nitric oxide acts as fertilizer for their growth and adaptation.
The first pathway uses the enzyme nitric oxide synthase in blood vessel linings. The second pathway starts in the mouth, where dietary nitrates from food are converted to nitrite by mouth bacteria, then to nitric oxide. This dietary pathway explains how certain foods increase nitric oxide and lower blood pressure.
Regular mouthwash use eliminates beneficial mouth bacteria needed for nitrate conversion. Multiple studies show mouthwash reduces nitrate production and raises blood pressure by 2-3 mmHg in healthy individuals. A clear correlation exists between high blood pressure and decreased nitrate production by the oral microbiome.
Healthy blood pressure is less than 120/80. The top number (120) is systolic pressure - pressure when the heart contracts. The bottom number (80) is diastolic pressure - pressure when the heart relaxes. The unit "millimeters of mercury" comes from Evangelista Torricelli's 1643 barometer invention. A 2-3.5 mmHg increase may seem small, but cumulative effects matter - like storing 50 extra calories daily leading to 52 pounds of fat over a decade.
The nose and sinuses produce nitric oxide. Breathing through the nose allows air to pick up nitric oxide for transport to the lungs. Nitric oxide serves dual purposes: antimicrobial defense in sinuses and airway widening for oxygen flow. Nasal breathing compared to mouth breathing lowers blood pressure by about 4 mmHg in healthy people.
Humming creates mechanical effects through oscillating airflow, moving stagnant air pockets and increasing surface area for nitric oxide production. Humming can increase nasal nitric oxide production by 15 times compared to calm exhalation. Use driving time or bathroom time to hum.
Exercise increases heart output and blood flow, creating shear stress that stimulates nitric oxide synthase. Regular exercise also increases nitric oxide synthase enzyme levels long-term. Regular exercise lowers blood pressure by approximately 3.5 mmHg overall, with effects up to 8+ mmHg in people with high blood pressure. Aim for at least 150 minutes weekly of moderate to vigorous aerobic activity plus resistance training.
A cup of beetroot contains approximately 500 mg of dietary nitrates. Studies show benefits at 500 mg nitrate doses. In one experiment with 10 healthy men consuming beetroot juice with 260, 520, or 1040 mg nitrates, the 520 and 1040 mg doses resulted in 12-14% improvement in endurance exercise tasks. No additional improvements occurred at 1040 mg versus 520 mg. Beetroot can be eaten whole rather than juiced, watching for added sugars in juice form.
Dr. Norwitz used AI to create low-carbohydrate, blood flow-boosting brownies. Cocoa in brownies can lower blood pressure by approximately 3 mmHg with 22 grams consumed. The brownies lowered blood sugar from 85 to 75 mg/dL within 30 minutes and provided an amazing muscle pump effect.
Additional nitrate-rich foods include rocket, spinach, dark leafy greens, radishes, and bok choy.
Polyphenols in olive oil support nitric oxide enzyme function and prevent nitric oxide breakdown. Free radicals formed during metabolism can destroy nitric oxide. Olive oil polyphenols eliminate free radicals first, allowing nitric oxide to persist longer.
Omega-3 fatty acids (EPA and DHA) increase nitric oxide through multiple mechanisms: activating pathways stimulating nitric oxide enzyme and reducing ADMA levels that destroy nitric oxide. A comprehensive analysis of 31 placebo-controlled trials found omega-3 supplements lower blood pressure by about 3 mmHg, particularly in people with high blood pressure. Consume at least 2 grams of combined EPA and DHA daily from supplements and low-mercury fatty fish like sardines and salmon.
- Avoid mouthwash to preserve oral microbiome
- Breathe through nose instead of mouth
- Hum favorite tunes
- Exercise at least 150 minutes weekly
- Consume nitrate-rich foods including beets
- Include extra virgin olive oil in diet
- Consume omega-3 fats daily
Nitrates can convert to nitrites, which under certain conditions may form nitrosamines linked to cancer. However, context matters significantly. The concern is greater with contaminated water and processed meats containing compounds that promote nitrosamine formation. Whole foods like beets contain antioxidants that inhibit harmful compound formation. Population data shows higher nitrate consumption from whole foods associates with better metabolic health and neutral or lower risk of certain cancers, including stomach cancer.
These tips provide cumulative daily benefits to blood vessels rather than revolutionary changes. Every breath, every step, and every heartbeat contributes to cardiovascular health.
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