Compounded medications are not FDA approved. FDA does not review compounded medications for safety, effectiveness, or quality before they are marketed.
Microdose GLP OneEvidence Edition · Updated July 20, 2026

Formulations

Injectable GLP-1 microdosing

Vials, pens, concentration, and the units-versus-milligrams risk that drives dosing errors.

Injectable GLP-1 microdosing uses vials or pens at below-maintenance doses. The central safety issue is units-versus-milligrams: an insulin-syringe 'unit' measures volume, not drug, so the same units can deliver different milligrams when a compounded concentration changes. This page explains the risks, not a dose.

What the evidence shows

  • Approved injectable GLP-1 products have robust dose-response evidence.
  • Concentration and labeling are the documented sources of injection dosing errors.

What the evidence does not show

  • That any compounded injectable microdose is proven for weight management.
  • That units map to a fixed milligram amount — they don't without the concentration.
Units are not milligrams. We do not provide unit-to-milligram conversions or a syringe calculator. If a compounded concentration changes between refills, the same "units" can deliver a different dose — confirm with your pharmacy. See units vs milligrams.

Frequently asked questions

Why is units vs milligrams a safety issue?

Because 'units' on an insulin syringe measure volume, not drug. The milligrams delivered depend on the compounded concentration, which can change between pharmacies or refills.

Not medical advice. This page is consumer education, not medical advice, and does not recommend a dose, product, or provider. Compounded medications are not FDA approved. Talk with a licensed clinician about your situation.