Side-by-side · Research reference

GHRP-2vsPTD-DBM

Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.

APhase 2HUMAN-REVIEWED15/42 cited

BAnimal-StrongHUMAN-REVIEWED10/40 cited

GHRP-2

Hexapeptide GHRP · Phase 2 (clinical diagnostic)

100–300 mcgPer doseBowers 1990

Phase 2Evidence levelBowers 1990 Sigalos 2018

~30 minHalf-lifeMalagón 1999

SQ · Multiple sites · 1–3×/day

PTD-DBM

Wnt Pathway Activator · Fusion Peptide

Topical / SQAdministrationLee 2023 Ryu 2023

Animal-onlyEvidence level

Wnt/β-cateninPrimary pathway

Topical / SQ · Study-dependent

01Mechanism of Action

Parameter

GHRP-2

PTD-DBM

Primary target

Ghrelin receptor (GHS-R1a) on anterior pituitaryBowers 1990

CXXC5–Dishevelled protein-protein interaction

Pathway

GHS-R1a → Gαq → Ca²⁺ → GH vesicle exocytosisBowers 2002

Inhibit CXXC5 binding to Dishevelled → Release Wnt/β-catenin pathway inhibitionLee 2015 Ryu 2023

Downstream effect

Strong GH pulse + IGF-1 elevation; appetite increase via ghrelin agonismBowers 2002

Activated Wnt/β-catenin signaling promotes hair follicle regeneration, dermal stem cell activation, reduced myofibroblast differentiation

Feedback intact?

Yes, with somatostatin feedback active

Not applicable — pathway derepression rather than receptor agonism

Origin

Synthetic hexapeptide; developed by Bowers/Tulane group in the 1980sBowers 1990

Engineered fusion: cell-penetrating PTD sequence + Dvl-binding motif targeting CXXC5

Antibody development

—

02Dosage Protocols

Parameter

GHRP-2

PTD-DBM

Standard dose

100–300 mcg per injectionBowers 1990

—

Frequency

1–3× per day

—

Lower / starter dose

50 mcg per dose

—

Evidence basis

Phase 2 + clinical diagnostic useBowers 1990

Animal models only (mice)

Duration

8–12 weeks on / 4 off (anecdotal)

—

Reconstitution

Bacteriostatic water

—

Timing

Pre-sleep + fasted preferred

—

Half-life

~30 minMalagón 1999

—

Wound healing protocol

—

Hydrogel patch delivery (concentration not disclosed)

Pyrogallol-HA patch, murine model.

Hair regeneration protocol

—

Topical application (exact dose not disclosed)

Wound-induced hair neogenesis model, mice.

Co-administration

—

Valproic acid (GSK-3β inhibitor) for wound healing synergyLee 2023

Combined treatment maximized scar reduction.

Human translation

—

No published human studies

04Side Effects & Safety

Parameter

GHRP-2

PTD-DBM

Cortisol elevation

Mild but measurableBowers 1990

—

Prolactin elevation

Mild but measurable

—

Hunger

Strong appetite increase

—

Injection site reaction

Mild erythema

—

IGF-1 elevation

Strong; monitor with chronic high-dose use

—

Cancer risk

Contraindicated in active malignancy

—

Pregnancy / OB

Avoid

—

Reported adverse events

—

None reported in animal studies

Wnt pathway activation risks

—

Theoretical risk of aberrant proliferation; Wnt dysregulation linked to tumorigenesis

Long-term safety

—

Unknown — no chronic dosing or human data

Delivery vehicle effects

—

HA-PG hydrogel well-tolerated in mice; human translation pending

Absolute Contraindications

GHRP-2

·Active malignancy
·Pregnancy / breastfeeding

PTD-DBM

·Active malignancy (Wnt pathway involvement in tumorigenesis)
·Pregnancy / lactation (no safety data)

Relative Contraindications

GHRP-2

·Untreated diabetes

PTD-DBM

·History of Wnt-driven tumors
·Skin lesions with uncertain malignant potential

05Administration Protocol

Parameter

GHRP-2

PTD-DBM

1. Reconstitution

Add 2 mL bacteriostatic water to 5 mg vial → 2.5 mg/mL.

Pyrogallol-functionalized hyaluronic acid (HA-PG) hydrogel patch loaded with PTD-DBM peptide, applied directly to wound bed. Adhesive hydrogel provides sustained release over multiple days.Lee 2023

2. Injection site

SQ — abdomen or thigh. Rotate sites.

Topical application to scalp or wound site. Precise formulation not disclosed; studies used Cxxc5 knockout or direct peptide application in wound-induced hair neogenesis models.Ryu 2023

3. Timing

Pre-sleep + fasted preferred.

PTD-DBM + valproic acid (GSK-3β inhibitor) in HA-PG patch showed synergistic effect on scar reduction and regenerative wound healing. VPA enhances Wnt pathway activation downstream.Lee 2023

4. Storage

Lyophilised: room temp, light-protected. Reconstituted: refrigerate ≤30 days.

Not disclosed in available literature. Peptide stability and storage conditions not published.

5. Needle

29–31G, 4–8 mm insulin syringe.

—

06Stack Synergy

GHRP-2

+ CJC-1295 (no DAC)

Strong

View CJC-1295 (no DAC) →

GHRP-2 + CJC-1295-no-DAC is a higher-amplitude alternative to the ipamorelin + CJC-1295 stack. GHRP-2 produces a stronger pulse but with cortisol + prolactin signal — choose when maximum GH amplitude is the goal and the side-effect tolerance is acceptable.

GHRP-2: 100–200 mcg SQ · pre-sleep
CJC-1295 (no DAC): 100 mcg SQ · same injection
Primary benefit: High-amplitude GH pulse, body composition

Bowers 1990 Teichman 2006

PTD-DBM

— no documented stacks