Instrument · not data

CGM Validation

The 90-day Clarity report is demoted from evidence to weak prior. Nothing in the regimen is gated on it until the sensor is validated as an instrument. This card is how you do that.

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Why the 90-day report cannot gate anything

1 · The bias changed sign across sensor sessions, and you cannot see it. Nine ~10-day sessions in the window, each with its own calibration history and its own offset. Hour-of-day means average across all nine. An hourly mean built from sessions with different, unknown, opposite-signed biases is not a physiological signal. It is a mixture.

2 · The 6/29 calibration was the worst possible moment to trust a fingerstick. You calibrated 65 → 95 off a hospital sample at Hct ~24. Amperometric glucose strips over-read at low hematocrit — fewer red cells impeding the reaction. A profoundly anemic patient's meter reads high. You may have corrected a working sensor upward by 30 points, into an unknown number of days.

3 · You performed ~63 calibrations in 90 days on a factory-calibrated sensor. The G7 requires zero. Each entry injects your fingerstick's error into the sensor and propagates it forward.

4 · ~20% of the window is inherently low-fidelity. Day 1 warm-up and day 10 end-of-wear across nine sessions ≈ 18 days. Clarity cannot exclude them.

5 · The window contains two hospitalizations, a transfusion, an ERCP, an enteroscopy, NPO days, liquid-diet days, IV fluids, opioids, and three separate eating architectures. The current architecture is one day old.

What survives — and only this

The coarse conclusion holds. Every fine-grained one does not.

Across 180 days and two independent 90-day windows, GMI reads 5.7% and 5.8%; HbA1c read 6.1% in January; C-peptide 2.1. Not one recorded reading above 250 in either window. Even under a ±15 mg/dL systematic bias, you are not a man with a hyperglycemia problem.

That is enough to say a glucose-lowering agent needs a real justification. It is not enough to say anything about the 5–7 PM band, the 2–6 AM minima, the shape of the evening curve, or "your best day." Those are retracted.

The finding that does not depend on the data at all

Page 2 of the report is device configuration, not measurement. It is immune to every objection above — and it is the most consequential thing in fifty-six pages.

AlertNowShould be
Urgent Low Soon
predictive · fires ~20 min before a projected <55
OFFON
Falling FastOFFON
Urgent Low5555 ✓
Low6060 for now
revisit after validation
High250200
inert at 250 · make it a canary

C-peptide 2.1 with impaired glucagon counterregulation. (The earlier “alpha cells are gone” line was anatomically false and is retracted — the head/uncinate are PP-rich and alpha-poor.) The single alert designed for exactly that physiology — the one that warns you before you arrive — is switched off. Turn it on today. It does not depend on trusting one number in the Clarity report.

Rehabilitation protocol · 5 days · start whenever
  1. Stop calibrating. Not once. The G7 does not need it, and every entry launders your fingerstick error into the sensor trace.
  2. Start a fresh sensor. Discard day 1 and day 10 from any analysis, permanently, from now on.
  3. Pair, don't correct. Twice daily — once at ~4:30 AM, once at ~5:45 PM — take a fingerstick and write down both numbers. Sensor first, then stick. Do not enter it into the app.
  4. Technique, every time. Wash with soap and warm water, dry completely. Do not use alcohol. Discard the first drop. Do not milk the finger. Warm hands.
  5. After 5 days you have 10 pairs. Mean(sensor) − mean(stick) is your bias, with a sign. The spread is your noise. Now, and only now, the sensor is an instrument.

Cost: ten fingersticks. Benefit: the ability to gate anything on this device again.

The nocturnal question — answer it with symptoms, not the sensor

The 2–6 AM sub-54 readings have two explanations, and the Clarity PDF cannot distinguish them.

The discriminator is free. For one week, on waking, note: night sweats · palpitations · vivid or disturbing dreams · morning headache · unusual fatigue on waking.

All absent → almost certainly compression. Sleep on the other arm and move on.
Any present → this is real, and it is a call to Kuhlman, not a supplement adjustment.

Until this is done

Nothing is gated on CGM. Not R-ALA, not Bilberry, not Panax, not Cordyceps. The gate board previously assigned each of them "its own CGM window" as the safety mechanism. That mechanism is currently not a competent instrument, and four glucose-active reintroductions were queued behind it.

The changes standing in rev 7.10 are held up by the cuff (39 Apple Health readings, Jul 4–8), the 7/7 labs, pharmacokinetics, and anatomy. Not by this report. That is deliberate.

CGM Instrument Validation · rev 2.0 · 7.13.2026
Dexcom G7 · Clarity v3.64.0 · 90-day window Apr 12 – Jul 10, 2026
the report is a weak prior, not evidence