How to Read Your Results
The GRN vascular age assessment produces three outputs: a vascular age estimate, a risk cluster assignment, and a protocol. This page explains what each means and how to use them.
Your vascular age score
Your vascular age is an estimate of how old your arterial system is behaving, based on 15 markers scored across five domains. It is not a diagnosis and it is not derived from a blood draw. It is a functional baseline built from the same types of inputs used in validated cardiovascular risk models.
The number by itself has limited meaning. What matters is the gap.
The gap
The gap is the difference between your vascular age and your chronological age. A 47-year-old man with a vascular age of 54 has a gap of +7. That gap is the target. The protocol is built to close it. The 90-day re-test measures whether it has.
| Gap | Interpretation | Signal |
|---|---|---|
| -5 or better | Below chronological age | Arteries are aging slower than typical. Protocol focuses on maintenance and prevention. |
| 0 to +4 | Age-appropriate | Vascular aging is within expected range. Early intervention prevents progression. |
| +5 to +9 | Elevated | Arteries are aging faster than expected. One or more functional markers are meaningfully impaired. |
| +10 or more | Significant | Multiple markers in the elevated range. Strong signal for immediate protocol intervention and physician consultation. |
If your vascular age is 10 or more years above your chronological age, use the protocol but also book an appointment with your physician. The protocol is not a substitute for clinical evaluation at this gap level.
Your cluster assignment
After scoring, the assessment assigns you to one or more of 8 risk clusters. Each cluster groups markers that co-occur and respond to the same protocol arm. Your cluster determines which protocol items you receive, in what priority order, and at what doses.
A cluster assignment does not mean the other markers are fine. It means your protocol is prioritized around the markers with the highest impact for your specific pattern. As markers improve, the protocol recalibrates.
Example: two men, same vascular age, different clusters
Man A, age 48, vascular age 56: Elevated resting blood pressure, low heart rate variability, disrupted sleep. Assigned to the Blood Pressure + Recovery cluster. Protocol leads with magnesium glycinate, L-citrulline, and a structured sleep protocol targeting cortisol reduction.
Man B, age 48, vascular age 56: Normal blood pressure, declining erectile function, reduced morning energy. Assigned to the Vascular + Sexual Function cluster. Protocol leads with Pycnogenol, L-citrulline, and zinc, targeting nitric oxide production in penile vasculature specifically.
Reading your protocol
Each protocol item is structured the same way:
- What it does: a plain-language description of the compound's function
- Why it is in your protocol: the mechanism tied to your specific cluster marker
- What to expect: a timeline for measurable change based on published literature
- The study: the specific peer-reviewed research behind the recommendation
- The dose: the amount and timing that matches the published evidence
Follow the timing instructions. Most compounds in the protocol have absorption or bioavailability windows that matter. L-citrulline on an empty stomach performs differently than with a meal.
The 90-day re-test
At 90 days, you retake the full 15-marker assessment. The re-test compares your new scores to your baseline across every marker. Two things happen from this:
- Verification: The gap either narrowed, held steady, or widened. A narrowed gap is objective confirmation the protocol is working for your specific cluster. A gap that held or widened triggers a recalibration.
- Recalibration: If a protocol arm is not producing measurable change by 90 days, it is replaced. The protocol is not a static document. It is a feedback loop. Your re-test score is the feedback.
The 90-day re-test is the most important step in the GRN protocol. A protocol without a verification step is a guess with better marketing. The re-test is what separates a verified result from a supplement recommendation list.
What counts as meaningful improvement
A reduction in vascular age gap of 2 or more years at 90 days indicates the protocol is working. A reduction of 5 or more years in 90 days occurs in users who were significantly elevated at baseline and who execute the full protocol with consistency. Improvements of 1 year or less suggest one or more protocol arms need recalibration.
What your results do not tell you
The vascular age assessment is not a medical diagnostic. It does not detect structural plaque, coronary artery disease, or acute cardiovascular risk. It measures functional vascular health using validated proxies. If your results are significantly elevated and you have symptoms such as chest discomfort, unexplained shortness of breath, or sudden changes in blood pressure, consult a physician before starting the protocol.
See our full Not Medical Advice page.
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