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Bioalmanac

Cyclic Glycine-Proline

cGP · Cyclo(Gly-Pro) · cyclic glycyl-proline

Preclinical

Status reviewed 18 Aug 2026

A naturally occurring metabolite of IGF-1 that appears to regulate how much IGF-1 is available, which is the opposite of supplying more of it.

Storage

Freeze-dried powder
Powder at room temperature, dry and out of light.
After mixing
Refrigerated if made into solution, and used within days.

Dose ranges reported in sources

Descriptions of what sources report, not recommendations.

GoalRangeFrequencySource
Commonly described community protocol10000–50000 mcgOnce dailyCommunity practice

When to stop

  • Any new lump, unexplained weight loss or unexplained persistent pain.
  • Any allergic response: rash, hives, facial swelling or difficulty breathing. Seek urgent care.
  • Any new neurological symptom.

Not approved as a medicine anywhere. It occurs naturally in the body and in some foods, and is sold as a supplement in some markets and as a research chemical elsewhere. No interventional human trial has been published.

Arithmetic on values you enter. Not medical advice. Not reviewed by a clinician. · bioalmanac.com/peptides/cyclic-glycine-proline

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