Side-by-side · Research reference

GHRP-2vsVesugen

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-MechanisticHUMAN-REVIEWED5/43 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

Vesugen

Bioregulatory Tripeptide · Vascular Endothelium

3 AATripeptide

Endothelin-1 ↓Atherosclerotic tissue

Ki-67 ↑Aged endothelium

SQ / IM · Protocol varies

01Mechanism of Action

Parameter

GHRP-2

Vesugen

Primary target

Ghrelin receptor (GHS-R1a) on anterior pituitaryBowers 1990

Vascular endothelial cell nucleus — MKI67 gene promoter

Pathway

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

KED → MKI67 promoter interaction (CATC binding motif -14 to +12 bp) → Ki-67 proliferation protein ↑

Downstream effect

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

Normalised endothelin-1 expression in atherosclerotic/restenotic endothelium, restored connexin expression for cell-cell communication, enhanced proliferative capacity in senescent endothelial culturesKozlov 2016 Khavinson 2014

Feedback intact?

Yes, with somatostatin feedback active

Not applicable — does not operate via hormone axis

Origin

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

Khavinson bioregulatory peptide school — designed as tissue-specific (vascular) cytomodulator

Antibody development

—

02Dosage Protocols

Parameter

GHRP-2

Vesugen

Standard dose

100–300 mcg per injectionBowers 1990

—

Frequency

1–3× per day

Not specified in available literature

Lower / starter dose

50 mcg per dose

—

Evidence basis

Phase 2 + clinical diagnostic useBowers 1990

Animal models (atherosclerosis, restenosis, aging) · Russian case series

Duration

8–12 weeks on / 4 off (anecdotal)

Case series report treatment courses in elderly arterial insufficiency

Reconstitution

Bacteriostatic water

—

Timing

Pre-sleep + fasted preferred

—

Half-life

~30 minMalagón 1999

Not reported

Tripeptides typically cleared rapidly.

Standard dose (reported)

—

Not standardised — Russian clinical case series

Protocols vary; no FDA-approved regimen.

Route

—

Subcutaneous or intramuscular

04Side Effects & Safety

Parameter

GHRP-2

Vesugen

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 documented in available abstracts

Injection site

—

Assumed minimal — typical for small peptides

Long-term safety

—

Unknown — no long-term RCT data

Epigenetic mechanism risk

—

Theoretical concern: direct gene promoter interaction — proliferative effects in non-target tissues not characterised

Absolute Contraindications

GHRP-2

·Active malignancy
·Pregnancy / breastfeeding

Vesugen

—

Relative Contraindications

GHRP-2

·Untreated diabetes

Vesugen

·Active malignancy — proliferative mechanism (Ki-67 upregulation) untested in oncologic context

05Administration Protocol

Parameter

GHRP-2

Vesugen

1. Reconstitution

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

Lyophilised powder reconstituted with sterile water or bacteriostatic water per supplier protocol. No standardised formulation.

2. Injection site

SQ — abdomen or thigh. Rotate sites.

Subcutaneous (abdomen, thigh) or intramuscular. Rotate sites if multi-dose protocol.

3. Timing

Pre-sleep + fasted preferred.

No reported circadian or fasting requirement. Russian protocols typically integrated into geroprotective regimens.

4. Storage

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

Lyophilised: refrigerate 2–8 °C, light-protected. Reconstituted: use immediately or refrigerate per supplier guidance (typically <7 days).

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

Vesugen

+ Thymalin

Multi-pathway

View Thymalin →

Both from Khavinson bioregulatory school. Thymalin targets thymic/immune axis, Vesugen targets vascular endothelium. Rationale: multi-system geroprotection in elderly — immune senescence + vascular aging. Documented in Khavinson-tradition protocols combining tissue-specific peptides for poly-organ rejuvenation. No direct synergy study; combinatorial logic based on distinct target tissues.

Vesugen: Per protocol (SQ/IM)
Thymalin: Per protocol (SQ/IM)
Frequency: Sequential or concurrent per geroprotective protocol
Primary benefit: Multi-system age-related decline mitigation (vascular + immune)