Excellent (1,579 reviews)

TB-500 5mg

Thymosin beta-4 fragment

  • Lot-specific COA available for every batch
  • 99%+ purity target — HPLC verified where available
  • Secure checkout · Discreet packaging · EU dispatch
From€54.00€92.00
Quantity
1
  • Lab-tested purity
  • Fast EU delivery
  • Secure checkout
Secure payment

Sealed items eligible for 28-day returns.

TB-500 5mg—
€54.00
  • Free EU shipping over €100
  • Lab-tested, COA per batch
  • Discreet, insulated packaging
  • Secure encrypted checkout

What our clients say

  • Michael K.Lost 30 lbs in 4 months
    Michael K. BeforeBefore
    Michael K. AfterAfter

    “Being the 'big guy' became who I was, but my health was slipping fast. RetaSet gave me structure that worked. I feel lighter, stronger, and more focused than I have in years.”

    RetaSet Weight Loss Program Member
  • James P.Down 20 lbs in 3 months
    James P. BeforeBefore
    James P. AfterAfter

    “I used to laugh off my 'dad bod', but deep down I felt awful. Sitting at a desk all day and eating on the go caught up with me. RetaSet made losing weight simple and realistic. I finally feel confident again.”

    RetaSet Weight Loss Program Member
  • Sarah T.More energy than I've had in years
    Sarah T. BeforeBefore
    Sarah T. AfterAfter

    “I used to avoid photos because I hated how I looked. RetaSet helped me change naturally, without pressure or guilt. I have real energy again and actually enjoy looking in the mirror.”

    RetaSet Weight Loss Program Member
  • Emma R.Finally feel like myself again
    Emma R. BeforeBefore
    Emma R. AfterAfter

    “After having kids, I thought I'd never get my body back. RetaSet helped me reset and taught me balance. I see real progress without feeling deprived — it finally feels doable.”

    RetaSet Weight Loss Program Member
  • Olivia H.35 lbs lost in 5 months
    Olivia H. BeforeBefore
    Olivia H. AfterAfter

    “I'd tried every fad diet with no luck. RetaSet was different — easy to follow with no guilt or crazy restrictions. The best part? My old jeans finally fit again and I actually feel healthy.”

    RetaSet Weight Loss Program Member

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About this product

TB-500 is a synthetic fragment of thymosin beta-4 studied for its role in cellular migration, tissue remodeling, and recovery research. Each 5mg vial includes batch-level lab documentation and ships in temperature-controlled packaging.

Excellent

Based on 1,247 reviews

  • 2026-02-14

    Professional from start to finish

    RetaSet feels like a serious research supplier. Documentation is clear, dispatch is fast, and everything arrives packaged properly.

    D. WilliamsVerified
  • 2026-02-11

    Clean website and easy COA access

    What impressed me most was how easy it was to access the COAs. Everything is transparent and well organised. That level of clarity builds trust.

    A. RahmanVerified
  • 2026-02-09

    Consistent quality standards

    We've placed multiple orders and the consistency has been excellent. Packaging, labeling, and documentation are always precise and professional.

    L. ThompsonVerified
  • 2026-01-28

    Better than the big suppliers

    Comparable to peptides I've sourced from larger suppliers, at a better price point. Documentation is clear and the COA matched the lab analysis.

    M. PetrovVerified
  • 2026-01-12

    Six weeks in — zero issues

    Used in my research over a six-week period without any issues. Lab analysis matched the published purity values. Will continue ordering.

    S. LindersVerified
  • 2025-12-22

    Fast EU dispatch

    Order shipped same day and reached Berlin in two business days. Insulated packaging held up, vials intact, paperwork in the box.

    J. BeckerVerified
  • 2025-12-15

    Responsive support team

    Had a question about reconstitution and got a thoughtful reply within an hour. Refreshing to deal with a supplier that actually responds.

    K. AndersenVerified
  • 2025-11-30

    Will reorder

    Quality is exactly what the COA describes. Packaging arrived intact and reconstituted cleanly. Already placed a follow-up order.

    F. MarchettiVerified

Frequently asked questions

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TB-500 5mg | Medusa Store | RetaSet