PinnyPeptide

DNSP-11 vs P21 (P021)

Side-by-side comparison: effects, dosing ranges, side effects, regulatory status, and reconstitution.

Peptide A

DNSP-11

Cognitive

Eleven-amino-acid peptide derived from the GDNF prodomain — neuroprotective for dopamine neurons.

Peptide B

P21 (P021)

Cognitive

Neurogenic, anti-tau peptide derived from ciliary neurotrophic factor — Alzheimer's research.

Typical vial

5 mg

Typical dose

Variable (research-specific) mcg

Half-life

Short; precise value uncharacterized

FDA status

Not FDA approved.

Typical vial

5 mg

Typical dose

Per kg dosing mcg

Half-life

Variable; designed for sustained activity

FDA status

Not FDA approved.

DNSP-11 effects

  • Dopaminergic neuroprotection in Parkinson's models
  • Increased dopamine production in dopaminergic neurons
  • Improved motor function in 6-OHDA and MPTP models
  • Mechanism distinct from full-length GDNF
  • Investigational for Parkinson's and related disorders

P21 (P021) effects

  • Promotes adult hippocampal neurogenesis
  • Increases dendritic spine density
  • Reduces tau hyperphosphorylation (anti-tauopathy)
  • Improves learning and memory in Alzheimer's mouse models
  • Crosses the blood-brain barrier after peripheral administration

DNSP-11 side effects

  • Essentially uncharacterized in humans
  • Possible local tissue effects with intracerebroventricular delivery
  • Theoretical: off-target effects on non-dopaminergic neurons
  • Injection-site reactions

P21 (P021) side effects

  • Essentially uncharacterized in humans
  • Theoretical: off-target effects on CNTF / leptin receptor pathways
  • Possible effects on appetite and metabolism (CNTF-family signaling)
  • Injection-site reactions

DNSP-11 dosing ranges

Research / Parkinson's models (preclinical)

Variable per protocol · ICV or peripheral routes · Per research design

P21 (P021) dosing ranges

Neurogenesis research (preclinical)

40-200 mcg/kg · Daily or alternate-day SubQ · Per research protocol

Full DNSP-11 guide → Full P21 (P021) guide →

DNSP-11 vs P21 (P021) — common questions

What is the difference between DNSP-11 and P21 (P021)?

DNSP-11: Eleven-amino-acid peptide derived from the GDNF prodomain — neuroprotective for dopamine neurons. Typical dose Variable (research-specific) mcg. P21 (P021): Neurogenic, anti-tau peptide derived from ciliary neurotrophic factor — Alzheimer's research. Typical dose Per kg dosing mcg. Both fall under the Cognitive category.

Can you stack DNSP-11 and P21 (P021)?

Stacking DNSP-11 with P21 (P021) is a protocol-design question best raised with a clinician — it depends on your goal, current bloodwork, and whether both peptides target overlapping mechanisms. Both peptides should be tracked independently with separate injection sites and timing. PinnyPeptide supports multi-peptide stacks with automatic injection site rotation.

Which is dosed more frequently, DNSP-11 or P21 (P021)?

DNSP-11 is typically dosed: ICV or peripheral routes for Research / Parkinson's models (preclinical). P21 (P021) is typically dosed: Daily or alternate-day SubQ for Neurogenesis research (preclinical).

Are DNSP-11 and P21 (P021) FDA approved?

DNSP-11: Not FDA approved. P21 (P021): Not FDA approved.

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