Side-by-side · Research reference
BPC-157vsMGF
Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.
APhase 2HUMAN-REVIEWED9/53 cited
BAnimal-StrongHUMAN-REVIEWED14/55 cited
BPC-157
Stable Gastric Pentadecapeptide · Healing
SQ or IM · Local · Once or twice daily
MGF
IGF-1Ec Splice Variant · Muscle-Specific
SQ · Research context only
01Mechanism of Action
Parameter
BPC-157
MGF
Primary target
VEGFR2 / nitric oxide / FAK-paxillin axes (proposed)Chang 2011Sikiric 2018
Satellite cells (Pax7+) in skeletal muscleMoore 2018
Pathway
Upregulates VEGFR2 → angiogenesis; modulates NO synthase; promotes fibroblast outgrowth via FAK-paxillinChang 2011
Mechanical stress → IGF-1Ec mRNA upregulation → Local E-domain peptide release → Satellite cell activation
Downstream effect
Accelerated tissue repair, reduced inflammation, improved gut barrier integritySikiric 2018
Satellite cell proliferation, myoblast differentiation, muscle fiber repair
Feedback intact?
No known endogenous receptor; mechanism still under investigation
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Origin
Synthetic pentadecapeptide derived from a sequence in human gastric juice; first characterised by Sikiric et al.Sikiric 2018
Alternative splicing of IGF-1 gene (exons 4-6) produces IGF-1Ec precursor; E-domain cleaved post-translationallyArmakolas 2016Vassilakos 2017
Antibody development
—
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02Dosage Protocols
Parameter
BPC-157
MGF
Standard dose
250–500 mcg / dayHwang 2016
Anecdotal community range. Phase 2 trial used 1.0 mg PL-14736 IV/day.
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Frequency
Once or twice daily
Split dosing reported anecdotally for chronic injury.
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Lower / starter dose
200 mcg / day
Conservative starter for new users.
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Duration
2–4 weeks (acute injury); 4–8 weeks (chronic)
Anecdotal; no long-term human safety data.
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Reconstitution
Bacteriostatic water, 1–2 mL
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Timing
Local SQ to injury site preferred (anecdotal)
Systemic SQ also used; oral bioavailability shown in animal studies.
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Half-life
~30 min plasma (estimated)
Tissue half-life longer; mechanism may explain durable effect.
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Synthetic peptide
—
24-amino-acid E-domain sequence
Corresponds to human IGF-1Ec exons 4-6 region.
Rodent cardiac model
—
200 μg/kg via peptide-eluting microstructures
Post-MI injection; improved ejection fraction by 8 weeks.
Acute delivery (mouse MI)
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Single bolus within 12 hrs post-infarctionShioura 2014
Delayed decompensation; no human protocol established.
Human evidence
—
None — no published clinical trials
All dosing extrapolated from animal models.
Detection in doping
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Full-length MGF detected via LC-MS in illicit productsThevis 2014
WADA-prohibited since 2005; no therapeutic indication.
04Side Effects & Safety
Parameter
BPC-157
MGF
Injection site reaction
Mild irritation (anecdotal)
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GI symptoms
None reported in PL-14736 Phase 2
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Cardiovascular
Not reported
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Antibody formation
No data (no long-term human trials)
—
Pregnancy / OB
Avoid — insufficient safety data
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Long-term safety
Unknown beyond Phase 2 trial duration
—
Drug interactions
None established
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Human safety data
—
None — no clinical trials published
Theoretical IGF-1 axis risk
—
Chronic IGF-1Ec overexpression linked to cancer progression (prostate, colorectal, breast)
Tumor promotion
—
IGF-1Ec overexpressed in osteosarcoma, colorectal polyps with dysplasia, endometrial cancer
Antibody development
—
Unknown — no longitudinal human exposure data
Local injection reaction
—
Presumed similar to other peptides (erythema, induration) — no direct evidence
Dysregulated expression with age
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Older adults (70+ yrs) show blunted IGF-1Ec response post-exercise vs youngMoore 2018
Absolute Contraindications
BPC-157
- ·Pregnancy / breastfeeding
- ·Known active malignancy (theoretical VEGF concern)
MGF
- ·Active malignancy or history of IGF-1-sensitive cancers (prostate, colorectal, breast, osteosarcoma)
- ·No established therapeutic use — investigational only
Relative Contraindications
BPC-157
- ·History of cancer
- ·Concurrent VEGF inhibitor therapy (theoretical)
- ·Acute thrombotic events
MGF
- ·Family history of IGF-1-axis malignancies
- ·Use outside research setting
05Administration Protocol
Parameter
BPC-157
MGF
1. Reconstitution
Add 1–2 mL bacteriostatic water to a 5 mg vial. Roll gently; do not shake. Solution should be clear and colourless.
MGF (E-domain peptide) has no approved clinical protocol. All published data derive from animal models or in vitro experiments.
2. Injection site
Subcutaneous near the injury site is the most common anecdotal route. Systemic SQ (abdomen) also used. Rotate sites.
Commercially available MGF corresponds to the 24-amino-acid human E-domain (hEc). Rodent E-domain (Eb) is structurally distinct and not interchangeable.
3. Timing
No strict timing requirement. Most users dose once or twice daily, often morning + evening.
Rodent studies used peptide-eluting polymeric microstructures (cardiac) or direct intramuscular injection. Routes and doses non-translatable to humans.Peña 2015Shioura 2014
4. Storage
Lyophilised: room temp, light-protected. Reconstituted: refrigerate 2–8 °C, use within 30 days.
MGF peptides prohibited in sport since 2005. Detection via LC-MS established for full-length MGF products.Thevis 2014
5. Needle
27–31G insulin syringe, 4–8 mm. Local injection allows finer 31G.
Any human use falls outside approved medical practice and regulatory frameworks. No safety or efficacy data exist.
06Stack Synergy
BPC-157
+ TB-500
StrongBPC-157 and TB-500 (Thymosin β-4) target distinct healing axes: BPC-157 upregulates VEGF-driven angiogenesis and fibroblast migration; TB-500 increases actin remodelling and cell migration via the actin-sequestering β-thymosin domain. Stacked, they cover both vascular (BPC) and structural (TB-500) regeneration pathways. Anecdotally favoured for tendon and ligament repair where both pathways contribute.
- BPC-157
- 250–500 mcg SQ · daily
- TB-500
- 2 mg SQ · 2× per week
- Primary benefit
- Tendon/ligament/muscle repair via complementary angiogenesis + migration
MGF
+ BPC-157
Multi-pathwayMGF activates satellite cells for muscle fiber repair; BPC-157 promotes angiogenesis, collagen synthesis, and tendon healing via distinct pathways (VEGF, FAK, integrin signaling). Theoretical synergy in post-injury contexts combines myogenic (MGF) and stromal (BPC-157) repair mechanisms. Both lack human validation.
- MGF
- No established dose
- BPC-157
- 250–500 mcg SQ near injury site
- Context
- Animal models only
- Primary benefit
- Theoretical multi-tissue repair (muscle + tendon/ligament)
+ TB-500
ModerateTB-500 (thymosin beta-4 fragment) enhances actin polymerization, cell migration, and angiogenesis—complementary to MGF satellite cell activation. Both upregulated post-injury; combined use presumed additive for muscle regeneration in preclinical models.
- MGF
- No established dose
- TB-500
- 2–5 mg SQ weekly
- Context
- Animal models only
- Primary benefit
- Satellite cell activation + enhanced migration/angiogenesis