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Thymalin

Longevity & Anti-aging

Thymalin

Also known as Timalin, thymus peptide extract

Limited human evidencePrescription in some countriesWADA prohibited

Price range: €25 through €39

Discussed for: Immune aging, thymus support.

Sequence: not listed. Modified or non-standard residues are left out on purpose.

Effect strengthHow hard it acts on the body3/10
Proof levelHow well that is shown in humans3/10
Risk levelHow much can go wrong2/10

Editorial 1 to 10 estimates from published research, not measured values. How to read these

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01 / Identity

What it is

Thymalin is a peptide extract from calf thymus. Main reported uses: immune aging, thymus support. Current status: prescription in Russia; not approved in EU/US.

Molecule type
Peptide extract from calf thymus
How it is taken
Injection (IM)
Other names
Timalin, thymus peptide extract

Route only. This library does not publish doses or protocols.

02 / Mechanism

How it is thought to work

Stimulates thymus function and T-cell maturation

Mechanisms seen in cells or animals do not always happen the same way in people.

03 / Potential benefits

What people use it for

Immune aging, thymus support

Limited human evidence

Small or low-quality human data. Most of what is claimed comes from animals, cells or anecdotes.

Listed uses are what people use it for, not proven outcomes.

04 / Known risks

Side effects and risks

Allergic reactions possible

Risk level 2 of 10

Lower risk score: reported side effects are mostly mild. Low risk is not no risk, especially for unregulated products.

Unknown long-term effects count as a risk, not as a clean record.

05 / Regulatory

Regulatory status

Status
Prescription in some countries
Details
Prescription in Russia; not approved in EU/US
Sport (WADA)
Yes: S0 (unapproved substance)

Status reflects information up to mid-2026 and changes over time. Check current sources.

06 / Evidence quality

How good is the evidence?

Limited: Russian clinical use

How we grade evidence

07 / Notes and sources

Notes and sources

  • Anyone using compounds like this regularly should have medical supervision and bloodwork (for example IGF-1, glucose and HbA1c, hormones, lipids).
  • Source: Peptide Reference Table, an editorial review of published research up to mid-2026. Scores are 1 to 10 editorial estimates, not measured values. Regulatory and WADA status change over time.

Educational information only. Not medical advice. Talk to a qualified healthcare professional before using any compound.

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