EGF is not evaluated or approved by the FDA. It is discussed for research and educational purposes only, not as medical guidance.

Is TB4-Frag FDA approved?

TB4-Frag is not evaluated or approved by the FDA. It is discussed for research and educational purposes only, not as medical guidance.

How is EGF administered in research settings?

In research settings, EGF is typically administered via the topical, subcutaneous, or microneedling routes. PeptideBase does not provide dosing or administration instructions.

How is TB4-Frag administered in research settings?

In research settings, TB4-Frag is typically administered via the subcutaneous or topical routes. PeptideBase does not provide dosing or administration instructions.

Home›Research›Compare›EGF vs TB4-Frag

Peptide Comparison

EGF vs TB4-Frag

Q: What is the difference between EGF and TB4-Frag?

EGF: Binds EGFR (EGF receptor / ErbB1), activating RAS/MAPK and PI3K/Akt signaling cascades. TB4-Frag: Active fragment of Thymosin Beta-4; promotes actin dynamics and cell migration; activates hair follicle stem cells; modulates inflammatory signaling

Both are Skin & Cosmetic peptides.

EGF

Epidermal Growth Factor

Skin & JointNot EvaluatedResearch Only

No providers listed yet

Full EGF profile →

TB4-Frag

Thymosin Beta-4 Fragment

Skin & JointNot EvaluatedResearch Only

Half-life: Unknown

12 providers listed

Full TB4-Frag profile →

Bottom line

EGF carries stronger published evidence (Cohort study, 3 key studies) than TB4-Frag (Animal, 2); both are research compounds.

Quick Verdict

EGF

Evidence

Observational

TB4-Frag

Evidence

Preclinical

Which One Should You Choose?

Your goal	Better option
Stronger clinical evidence	EGF
More provider options (0 vs 12)	TB4-Frag

Research summary only — not medical advice. Consult a qualified provider before making any decisions.

Side-by-Side Comparison

EGF

TB4-Frag

Mechanism Family

Skin & Cosmetic

Half-life

—

Unknown

FDA Status

not evaluated

Admin Routes

topical, subcutaneous, microneedling

subcutaneous, topical

Availability

Research Only

Providers

None listed

12 listed

Avail. Notes

—

N-terminal TB-4 fragment (Ac-SDKP tetrapeptide). Distinct from full-length TB-500/Thymosin Beta-4 (Category 2). No separate FDA action on this fragment. Anti-fibrotic research use only.

Research Evidence

EGF

ObservationalCohort study · 3 key studies · most recent 2026

TB4-Frag

PreclinicalAnimal · 2 key studies · most recent 2016

Research Citations

EGF

Review2026 · Cell Tissue Bank

Determinants of extraction efficiency in human amniotic membrane processing: biological, mechanical, and bioc…

Cohort2026 · Gels

Development of Antiseptic and Epidermal Growth Factor Co-Loaded Thermoresponsive Composite Hydrogel for Wound…

Cohort2009 · International Wound Journal

The efficacy and safety of epidermal growth factor in treatment of diabetic foot ulcers: the preliminary resu…

TB4-Frag

Animal2016 · Molecular Genetics and Genomics

Role of thymosin beta 4 in hair growth

Animal2007 · Annals of the New York Academy of Sciences

Thymosin beta 4 induces hair growth via stem cell migration and differentiation

About EGF

Binds EGFR (EGF receptor / ErbB1), activating RAS/MAPK and PI3K/Akt signaling cascades. Promotes keratinocyte and fibroblast proliferation, accelerates wound re-epithelialization, and stimulates collagen and hyaluronic acid production.

Research Areas

skin regenerationwound healingcollagen stimulationpost-procedure recovery

About TB4-Frag

Active fragment of Thymosin Beta-4; promotes actin dynamics and cell migration; activates hair follicle stem cells; modulates inflammatory signaling

Research Areas

hair growthwound healinganti-inflammatorytissue repair

Safety Profile

Information below reflects published research data only — not medical advice. Consult a qualified provider before use.

EGF

Absolute Contraindications

Under clinical review

Being verified by our medical team before we display contraindications for this peptide.

TB4-Frag

No established clinical contraindications. This is an investigational compound with limited human data and has not been evaluated by the FDA for safety in this context. Consult a qualified clinician.

Find Providers

Where to source these peptides

Providers offering

EGF

Browse directory →

Providers offering

TB4-Frag

12 listed

Browse directory →

PeptideBase lists providers for educational research purposes only. Always consult a qualified healthcare professional before obtaining or using any peptide.

More Skin & Cosmetic Comparisons

Browse all peptides →

Educational research tools — not medical advice.