Continuous Glucose Monitor (CGM)
Two-week data on how YOUR glucose responds to a peptide protocol. Most underrated tool in the space.
What it is
Wearable sensor (Dexcom Stelo, Abbott Lingo, Levels) that reports interstitial glucose every 5–15 minutes for 14 days. Now OTC in the US without prescription.
Why peptide users take it
GLP-1 users see massive glucose smoothing, useful to verify the drug is working. GH-secretagogue users (CJC, Ipamorelin, MK-677) sometimes get glucose elevation that goes unnoticed without monitoring. Single 14-day cycle is ~$80 and tells you more than 3 months of guessing.
Pairs with these peptides
How it actually works
A small filament sits in interstitial fluid (just under the skin) and measures glucose continuously, transmitting via Bluetooth to an app. Interstitial glucose lags blood glucose by 5–15 minutes but tracks it closely enough for trend analysis. Two weeks of data captures fasting baselines, meal responses, dawn-phenomenon spikes, and overnight stability, far more signal than spot-check fingersticks.
Dose
When to take
Signs you actually need this
- Don't know what your fasting glucose actually runs
- Can't say which foods spike YOU vs in general
- On a GH-secretagogue without ever measuring glucose response
- Tirz/reta dose escalations without watching for hypoglycemia symptoms
Signs it's working
- You see your real glucose patterns for the first time
- Identify 2–3 specific foods that spike you (often unexpected)
- Verify your peptide is doing what it should, or catch when it isn't
- Adjust meal timing based on actual data, not guesses
Common mistakes
- Trusting individual readings in week 1, sensors often need 24–48 hrs to stabilize
- Reacting to single spikes instead of trends, meal response variance is normal
- Wearing during heavy training without noting it, exercise drops interstitial glucose temporarily
- Treating it like a fingerstick replacement for hypo detection, interstitial lags blood by 5–15 min
Where to buy
Editorial picks. Brand selection follows the quality criteria (USP/NSF or third-party COA where possible). Affiliate links , see the disclosure at the bottom of /supplements.
Caveats
- Interstitial glucose lags blood by 5–15 min; not a fingerstick replacement for hypo detection.
- First sensor often reads slightly off; trust trends not single readings in week 1.
Turn this peptide into a plan that's yours
The info above is free. Membership makes it personal, the Coach answers questions about your exact stack, the Stack tracks it for you, and the Sources desk shows you how to vet what you buy.
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