Longevity network
Longevity Centers of America (Netzwerk)
- Hormone therapy (HRT / BHRT)
- Peptide therapy
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§ — Substance profile
C
TB-500
Thymosin beta-4 fragment · Tβ4 (17-23) · Synthetic fragment of thymosin beta-4
01 — Regulatory status
Regulatory status · United States · as of September 2026
Not FDA-approved. Removed from 503A Category 2 in April 2026; reviewed by PCAC on July 23, 2026 with FDA proposing not to list. Not eligible for 503A compounding.
Source: FDA 503A Bulks List · PCAC meeting records · verified September 2026
- Approved drug with randomized controlled trials for the approved indication
- Human clinical data exists, but no approval for the researched use
- Animal or in-vitro data only, no controlled human trials
- No published clinical data; use rests on anecdote
A
B
C
D
Reviewed September 2026 · Sources: FDA, EMA
02 — Researched for
What is being studied.
Wound healing, cardiac tissue repair after injury, corneal healing.
03 — What the evidence shows
The published record.
Animal models show angiogenesis and cell-migration effects. Human trials of full-length thymosin beta-4 exist for dry eye and wound healing; the synthetic TB-500 fragment sold online has no controlled human data of its own.
04 — What is claimed but not shown
Claimed, not demonstrated.
Faster recovery from musculoskeletal injury in humans; hair regrowth; systemic anti-aging effect.
05 — Known risks
Documented risks.
Angiogenic mechanism raises theoretical concern in undiagnosed malignancy; purity unknown from grey-market sources; doping-relevant.
06 — Researched for these goals
Where TB-500 appears.
07 — Questions for your physician
Six questions worth printing.
- 01What is your primary board certification, and in what year did you obtain it?
- 02Is this peptide approved for what you are prescribing it for — and if not, what is the legal basis on which you are supplying it?
- 03Which human trials support this use, and what were their size and duration?
- 04Where does the product come from, and can you show me a certificate of analysis for this batch?
- 05What outcome will we measure, when, and what happens if it does not improve?
- 06What is the total cost for the first three months, in writing?
Providers offering peptide therapy
Listing in the registry is not an endorsement of any substance or protocol, and it is not a statement that a treatment is approved.
Reviewed September 2026 · Sources: FDA, EMA
This page reports on the state of research and regulation for orientation. It is not medical advice, not a recommendation for or against any substance, and not an offer. Regulatory status changes; the date shown is the date of our last verification. Discuss any treatment with a licensed physician.