Your arteries have an age your annual physical has never measured. GRN Labs measures it, then builds you the specific weekly protocol to lower it, verified at 90 days.
Take the Free Vascular Age CalculatorYou exercise. You eat reasonably well. You get your annual physical and hear the same answer: everything looks normal. But something changed. You noticed it in the bedroom first. Then in the afternoon slump that caffeine stopped fixing. Then in the focus that is not what it was three years ago.
The problem is not your effort. The problem is that the markers your doctor checks do not include the ones that govern vascular function. LDL does not measure nitric oxide. A lipid panel does not evaluate the condition of your arterial lining. The gap between what gets tested and what actually drives performance is where this platform operates.
The markers that assess vessel wall integrity, nitric oxide production, and vascular inflammation are validated by published research. Standard physicals do not include them. Fewer than 1% of physicians order them on a routine basis.
If your doctor told you your numbers look good, they were probably right about the numbers they checked.
Sexual performance, brain function, and vascular age share a common upstream cause. These are the three mechanisms that control it.
ADMA is a naturally occurring compound that competes with arginine for the enzyme that produces nitric oxide. When ADMA rises, nitric oxide drops, vessels constrict, and blood flow to high-demand organs decreases. The brain and genitalia are the most sensitive to reduced perfusion. Fewer than 1% of physicians order an ADMA test.
A microscopic gel layer lines every blood vessel. Spanning roughly 3,000 square meters across the vascular tree, it controls what crosses the vessel wall, senses blood flow, and triggers nitric oxide production. When it degrades due to cortisol, oxidative stress, or blood sugar fluctuation, the cascade toward plaque begins. Most physicians never evaluate it.
When the vessel lining cannot respond to flow demand, blood pressure rises to compensate. Energy delivery to high-demand organs drops. This presents as brain fog, chronic fatigue, and declining sexual performance long before a cardiac event occurs. Standard physicals do not test endothelial function directly.
The 11-test Expanded Panel measures the markers that research connects to early vascular dysfunction. Standard physicals typically measure four values from this list.
Blocks nitric oxide synthesis at the enzymatic level. When ADMA rises, your body cannot produce enough NO to keep vessels dilated on demand. Elevated ADMA is one of the earliest detectable signals of vascular dysfunction. Fewer than 1% of physicians order this test on a routine basis.
Counts the total number of harmful lipoprotein particles in the blood, including LDL, IDL, VLDL, and Lp(a). Particle count predicts plaque formation more accurately than cholesterol concentration alone. A patient can have controlled LDL and still carry a high ApoB particle burden.
A genetically determined lipoprotein that accelerates plaque formation independently of LDL and cannot be lowered by statins. Elevated in roughly 20% of the population. Rarely included in a standard lipid panel. Knowing your Lp(a) level is essential for accurate vascular risk assessment.
An amino acid that directly damages the endothelial lining when elevated. High homocysteine accelerates glycocalyx degradation and vascular aging. Importantly, elevated homocysteine is often correctable through targeted B-vitamin intervention. The standard ceiling of 15 µmol/L permits sustained endothelial damage. Research supports an optimal target below 7 µmol/L.
Quantifies systemic vascular inflammation. A strong independent predictor of cardiovascular events in patients with controlled LDL. The standard "normal" threshold is below 3.0 mg/L. Research consistently shows that targeting below 1.0 mg/L is superior for vascular risk reduction. Patients between 1.0 and 3.0 mg/L are typically told their results are normal.
Detects insulin resistance before it becomes visible on a standard metabolic panel. Insulin resistance drives endothelial damage, glycocalyx degradation, and is a primary upstream driver of vascular aging. Standard panels check glucose alone, which misses the majority of insulin-resistant patients who still have normal fasting glucose.
Maps hormonal status alongside vascular markers. Low testosterone frequently coexists with vascular dysfunction but is rarely tested in that context. The interaction between testosterone and vascular health operates in both directions: low T contributes to endothelial dysfunction, and vascular dysfunction reduces testicular perfusion. Both markers matter.
Thyroid output directly affects vascular tone, metabolic rate, and endothelial repair. Subclinical thyroid dysfunction drives fatigue and brain fog that appear unrelated to cardiac function on standard testing. TSH alone misses a significant portion of subclinical cases. Free T3 measures active thyroid hormone at the tissue level.
Regulates endothelial repair pathways and immune modulation within the vessel wall. Deficiency correlates with increased cardiovascular risk and impaired recovery. The standard "normal" floor is 20 ng/mL. Endothelial repair mechanisms require levels between 50 and 80 ng/mL to function optimally. Most men testing in the "normal" range are well below that threshold.
Chronic cortisol elevation is one of the primary degrading agents of the endothelial glycocalyx. It also directly suppresses nitric oxide production. Tracking cortisol alongside vascular markers captures the vascular cost of sustained stress, which is otherwise invisible on a standard panel.
Baseline organ function across liver, kidney, and electrolytes. Confirms the metabolic foundation before protocol customization and establishes a reference point for cycle-over-cycle tracking. Changes in liver and kidney function are relevant to supplement selection and suppression logic.
Standard reference ranges are set to identify disease in the general population. They are not calibrated for vascular performance or longevity. For five of the most critical vascular markers, the gap between "normal" and optimal represents years of arterial age.
| Marker | Standard Range | Optimal Range | What the gap means |
|---|---|---|---|
| ApoB | <130 mg/dL | <70 mg/dL | The standard threshold permits double the particle burden that research associates with minimal plaque risk. A patient at 120 mg/dL is told they are normal. |
| hs-CRP | <3.0 mg/L | <1.0 mg/L | Patients between 1.0 and 3.0 mg/L carry significant inflammatory burden and are classified as normal. This range is where intervention most changes long-term trajectory. |
| Lp(a) | <75 nmol/L | <30 nmol/L | The standard threshold allows sustained plaque acceleration in genetically predisposed individuals. Lp(a) cannot be modified by statins, so knowing the level determines what intervention makes sense. |
| Homocysteine | <15 µmol/L | <7 µmol/L | Endothelial damage accelerates at levels above 7 µmol/L, well below the standard ceiling. Most endocrinologists and cardiologists agree on the lower target. Most routine panels never check it. |
| Vitamin D | 20–50 ng/mL | 50–80 ng/mL | Endothelial repair pathways require Vitamin D at the upper end of the optimal range. The standard floor of 20 ng/mL is below the level at which these repair functions operate effectively. |
The process that produces elevated vascular age follows a specific sequence. It begins years before a scan detects anything. Understanding where you are in the sequence determines where intervention will have the most impact.
The protective gel layer lining every blood vessel begins to thin. Cortisol, blood sugar fluctuations, and oxidative stress are the primary degrading agents. As the glycocalyx thins, the vessel wall becomes permeable. This is the initiating event in vascular aging. It is measurable years before imaging captures any structural change.
As glycocalyx integrity falls, ADMA rises and nitric oxide production drops. Vessels can no longer dilate on demand. Blood pressure begins to compensate for reduced flow capacity. High-demand organs including the brain and genitalia receive less blood. This is when performance symptoms begin, often years before any lab flag appears.
Without the glycocalyx barrier, LDL particles penetrate the vessel wall. Macrophages accumulate and attempt to clear them. Foam cells form. Inflammatory markers rise. This is the beginning of plaque formation. It is already underway at this stage, but imaging may still show nothing. hs-CRP and ApoB elevations are the primary early signals.
The arterial wall stiffens. Flow resistance increases. The heart works harder to maintain output. Calcium begins to deposit around lipid-rich plaque cores. This is the stage a coronary calcium score finally captures, typically years into the process. It is the last point in the sequence, not the first.
GRN Labs is not for men who are satisfied with a normal result. It is for men who know something changed and want to find out exactly what.
Erection quality and morning response are early vascular signals. They declined before your energy or cognition did, because those tissues are the most sensitive to reduced blood flow. The symptom is vascular, not psychological.
Your annual physical came back clean. Focus is lower, energy drops earlier, performance changed. The right markers were never tested. "Normal" on a standard panel and optimized vascular function are different things.
You may have explored TRT, longevity clinics, or concierge medicine. None of it addressed the vascular layer, the part of your biology that determines how well every organ gets supplied with blood. That is the gap GRN Labs fills.
The full cycle runs from your first calculator result to a 90-day re-test comparison. Every step is trackable and specific to your marker pattern.
Vascular age is not fixed. These are members who ran one full protocol cycle and re-tested.
My cardiologist said my calcium score was elevated but not enough to treat. That is not the same as being fine. I needed a protocol, not a watch-and-wait. Six months in, every marker GRN tracks moved in the right direction.
M.T., 47 · Physician · California
I had been waking up at 3am for two years and chalked it up to stress. It turned out to be a cortisol and vascular issue. Sleep improved by week six. Energy by week eight. I had no idea these things were connected.
D.R., 51 · Operations executive · Colorado
I did not come here for the bedroom. I came because I was getting winded on stairs at 48. The calculator told me something was wrong before any doctor confirmed it. The re-test seven years later proved it.
Name withheld · Age 48 · Pacific Northwest
Your protocol is accessible from any device and starts the moment you subscribe. It adapts as new data comes in without requiring you to change how you work.
Your protocol is accessible from any phone, tablet, or computer. Your first week's recommendations begin the moment you subscribe, before your labs even arrive.
A check-in arrives by text every week. Reply in under 10 seconds without opening the app. Your responses track adherence and inform protocol refinements over time.
Upload your results as a PDF from any major laboratory. Your protocol parses the markers and recalibrates automatically when new results arrive. No proprietary lab required.
We measure 11 vascular tests across 15 biomarkers, including ADMA (which tracks nitric oxide suppression), ApoB (particle count beyond standard cholesterol), Lp(a), homocysteine, hs-CRP, and others. Fewer than 1% of physicians order these markers on a standard panel. Our Expanded Panel evaluates the vessel wall itself, beyond what standard lipid panels reveal.
GRN Labs is built for high-performing men, typically 35 to 55, who are experiencing brain fog, declining energy, or changes in sexual performance. Most have been told their results look normal by their physician despite noticing clear changes. If you have already invested in health optimization and want a data-driven, root-cause approach, this protocol was built for you.
GRN Labs is a wellness and optimization coaching service. We are not a medical clinic and do not diagnose, treat, or prescribe. This information is for educational purposes only and is not intended as medical advice. Consult your healthcare provider before starting any new supplement or wellness protocol. Individual results may vary.
Your GRN Labs subscription is continuous. Most members complete a 90-day cycle: baseline labs when you join, protocol runs for 90 days, then a re-test panel to measure progress. Your protocol then recalibrates for the next cycle based on what moved. $199 per year covers protocol access, all updates, and weekly check-in tracking.
Many of our members work with other providers. GRN Labs fills a specific gap: the vascular markers and glycocalyx-focused approach that most concierge practices and longevity clinics do not include in their panels. Our protocol is designed to complement your existing care without replacing it.
Take the free vascular age calculator. Your score generates in minutes and surfaces the markers your annual physical never checked.
Take the Free Vascular Age Calculator