Endothelial function & nitric oxide
One of 5 mechanistic pathways to 🫀 Heart, cholesterol & blood pressure · 20 options
The endothelium is a single cell layer regulating tone, clotting and inflammation. Its dysfunction precedes plaque by decades and is measurable long before anything shows on a scan — which makes it the earliest place to intervene.
ADMA inhibits nitric oxide synthase directly, so it is the most specific endothelial marker available. Dysfunction here precedes visible plaque by decades.
ADMA & SDMAhs-CRP (High-Sensitivity C-Reactive Protein)HbA1c (Hemoglobin A1c)HomocysteineLipid Panel (Cholesterol, HDL, LDL, Triglycerides)🫀 Real Cardiovascular Risk covers these in one panel →
What engages this pathway
Ordered by how directly each one acts on the mechanism above — never by how much trial evidence exists. Each links to its full breakdown with dosing, half-life and vendor.
🧬 Beetroot (Nitrates)
Dietary nitrate lowers systolic blood pressure by 4–5 mmHg in meta-analysis via the nitrate-nitrite-NO pathway, which bypasses the enzymatic route entirely.
🧬 Cocoa Flavanols
Improve flow-mediated dilation in controlled trials; the COSMOS trial showed reduced cardiovascular mortality as a secondary endpoint.
🧬 Pycnogenol
Increases eNOS expression with trial data for endothelial function and blood pressure.
🧬 L-Arginine
NOS substrate; limited by arginase first-pass metabolism.
🧬 Citrulline Malate
Raises arginine more effectively and lowers blood pressure modestly in trials.
🧬 Nitrosigine
Better-absorbed arginine with sustained vascular effects.
🧬 Epicatechin
The cocoa flavanol responsible for most of the endothelial effect.
🧬 Grape Seed Extract
Proanthocyanidins with blood-pressure and endothelial trial data.
🧬 Pomegranate Extract
Punicalagins reduced carotid intima-media thickness in a small trial — a structural rather than functional endpoint, which is rare.
🧬 Hesperidin
Citrus flavonoid improving endothelial function and microcirculation.
🧬 Citrus Bioflavonoids
Hesperidin, diosmin and naringin together — venous as well as arterial benefit.
🧬 Taurine
Lowers blood pressure in trials and supports cardiac calcium handling.
🧬 Magnesium
Vascular smooth-muscle relaxation; meta-analysis confirms a modest blood-pressure reduction.
💉 Telmisartan
ARB with partial PPARγ agonism — pressure plus insulin sensitivity in one molecule.
💉 Nebivolol
The beta-blocker with NO-mediated vasodilation and the best metabolic and sexual side-effect profile in its class.
💉 Lisinopril
ACE inhibition with strong outcome data, particularly in diabetes and heart failure.
💉 Losartan
Angiotensin-receptor blockade with an additional uricosuric effect, which is unique in the class and matters if gout or high urate is part of the picture.
🧬 Hibiscus
Lowers blood pressure in randomised trials comparably to low-dose captopril in one head-to-head.
🧬 Hawthorn
Meta-analysis supports symptom improvement in chronic heart failure; positive inotropy plus vasodilation.
🧬 Arjuna
Traditional cardiotonic with small trials in angina and heart failure.
The other 4 routes to heart, cholesterol & blood pressure
Pick the pathway that matches where you are actually stuck. An appetite drug does nothing for someone who already undereats.
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Frequently asked questions
The endothelium is a single cell layer regulating tone, clotting and inflammation. Its dysfunction precedes plaque by decades and is measurable long before anything shows on a scan — which makes it the earliest place to intervene.
20 options are mapped to this pathway in the Vault, including Beetroot (Nitrates), Cocoa Flavanols, Pycnogenol, L-Arginine. They are grouped by the mechanism they act through rather than ranked by how much trial evidence exists — 20 carry clinical validation and 0 are mechanistic predictions.
ADMA inhibits nitric oxide synthase directly, so it is the most specific endothelial marker available. Dysfunction here precedes visible plaque by decades. The markers worth checking are ADMA & SDMA, hs-CRP (High-Sensitivity C-Reactive Protein), HbA1c (Hemoglobin A1c), Homocysteine.
Unproven is not the same as ineffective. Of the 20 options on this pathway, 20 have clinical validation and 0 are graded theoretical — meaning the mechanism is sound but the specific human trial has not been run, which is true of a great deal of what works in this space. Nothing on this page is ordered by evidence tier, because sorting by trial count would bury the compounds you came looking for.