# BDNF: track every shot, units to draw

> Reconstitution calculator, daily schedule, site rotation for BDNF. Track it in Peppy, private on your iPhone.

Source: https://peppytracker.com/compounds/bdnf/
Last updated: 2026-09-02

Endogenous neurotrophin critical for synaptic plasticity, learning, and neuronal survival; recombinant forms are studied primarily in preclinical models due to limited blood-brain barrier penetration. In the Peppy catalog, BDNF is reconstituted from a vial and drawn up in units on an insulin syringe, dosed in mcg, typically daily.

## Frequently asked

### How many units is 250 mcg of BDNF?

It depends on how the vial was mixed. Example: a 5 mg vial plus 2 mL of bacteriostatic water is 2.5 mg/mL, so 250 mcg is 0.1 mL, or **10 units** on a U-100 insulin syringe. Change the water and the units change. Use the calculator above with your own vial, and verify with your prescriber.

### Can I track BDNF in Peppy?

Yes. BDNF is one of 123 compounds built into Peppy, with its form, unit and typical frequency prefilled. Add it as a protocol, set your schedule, and Peppy handles the countdown, the log and the reminders (Pro).

### Where should I inject BDNF?

Follow your prescriber's instructions. For subcutaneous shots the GLP-1 labels list the abdomen, thigh and upper arm and say to rotate. Peppy's body map has 13 sites, suggests the next one, and shows when each was last used. Read the [site rotation guide](https://peppytracker.com/guides/injection-site-rotation/).

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Peppy is a tracking tool, not medical advice. Dose calculations are mathematical conversions only. Always follow your prescriber's instructions and verify every draw-up yourself.

Peppy is a free iPhone app (Pro subscription optional). App Store: https://apps.apple.com/us/app/peptide-tracker-peppy/id6775005514