Uncovering the Potential of Nitric Oxide in Treating Erectile Dysfunction, with Dr. Nathan Bryan

11 Nov 2025 · 69 min
Episode

11 Nov 2025 · 69 min

0:00

Podcast interview (recorded Feb 2, 2023) in which Dr. Anne Truong (host) speaks with nitric-oxide researcher Dr. Nathan Bryan (PhD). They review nitric oxide (NO) as a short-lived gaseous signaling molecule critical for vasodilation, oxygen delivery and immune/neurological roles. Two production pathways are explained: (1) enzymatic endothelial NO synthase (eNOS) that becomes dysfunctional with age, oxidative stress and certain SNPs; and (2) an enterosalivary dietary pathway (nitrate from leafy greens → concentrated in saliva → reduced by oral bacteria to nitrite → converted to NO in the stomach). Causes of NO deficiency discussed include poor diet, antioxidants/oxidative stress, mouthwash/antiseptic use, fluoride toothpaste, long-term antacid/PPI use, and genetic variants (e.g., MTHFR influence). The episode cautions against routine L-arginine/L-citrulline supplementation for patients with endothelial dysfunction (can worsen oxidative stress), describes a saliva nitrite test strip (baseline and 90-minute post-meal test), and discusses two commercial NO products by Dr. Bryan (an NO-generating lozenge, NO2U, and a fermented beet powder, noBeets) with dosing, onset, and safety notes. Lifestyle recommendations (more leafy greens, sunlight/red/infrared exposure, exercise, reduce mouthwash/PPIs, intermittent fasting, sleep) are emphasized. Clinical and safety caveats include blood-pressure effects and rare risk of methemoglobinemia with excessive NO/nitrite.

Questions this episode answers

February 2, 2023.

About 10–12% endothelial function loss per decade (guest statement).

About 50%.

Approximately 90 minutes after consumption, with elevated levels lasting ~6–12 hours.

At least 300–400 milligrams (per serving, guest statement).

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