Side-by-Side Comparison · 2026

OTR-AC vs Thymosin Beta-4

OTR-AC vs Thymosin Beta-4 — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

OTR-AC
Healing & Recovery

OTR-AC is the common name for oral high-dose BPC-157 acetate. The peptide sequence (GEPPPGKPADDAGLV) is identical to injectable BPC-157 but is dosed at 2–5 mg orally rather than 250–500 µg subcutaneously to compensate for GI degradation and first-pass metabolism. The oral route p...

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Thymosin Beta-4
Healing & Recovery

Thymosin Beta-4 (TB-4) is the full-length 43-amino acid actin-sequestering peptide from which the commonly used research fragment TB-500 (residues 17-23, LKKTETQ) is derived. TB-4 is the most abundant thymosin-family protein in virtually all mammalian cells, where it maintains th...

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Key Parameters
Parameter OTR-AC Thymosin Beta-4
Category Healing & Recovery Healing & Recovery
Research Preclinical Extensively Studied
Half-Life 4–6 hours (estimated, oral) ~30-60 min (plasma)
Typical Dose 2–5 mg 1.5-2.5 mg, 2-3x/week
Frequency Once daily 2-3 times per week
Route Oral Subcutaneous, IV, Topical, Intranasal
FDA Status Not Approved Phase II

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Frequently Asked Questions
What is the difference between OTR-AC and Thymosin Beta-4?
OTR-AC: OTR-AC is the common name for oral high-dose BPC-157 acetate. The peptide sequence (GEPPPGKPADDAGLV) is identical to injectable BPC-157 but is dosed at 2–5 mg orally rather than 250–500 µg subcutaneou... Thymosin Beta-4: Thymosin Beta-4 (TB-4) is the full-length 43-amino acid actin-sequestering peptide from which the commonly used research fragment TB-500 (residues 17-23, LKKTETQ) is derived. TB-4 is the most abundant...
Which has a longer half-life, OTR-AC or Thymosin Beta-4?
OTR-AC half-life: 4–6 hours (estimated, oral). Thymosin Beta-4 half-life: ~30-60 min (plasma).
Can you stack OTR-AC and Thymosin Beta-4?
OTR-AC and Thymosin Beta-4 are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.