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Ships fully reconstituted · no mixing, no powder, no bacteriostatic water
All peptides
Thymosin Alpha-1
Immune

Thymosin Alpha-1

Ships fully reconstituted · no mixing, no powder, no bacteriostatic water

Immune System Optimizer

Trains your immune system's T-cells to fight infections and strengthen defenses.

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Extra 10% off your first order · use code WELCOME10 at checkout (stacks with the supply discount above).

Physician-reviewed · charged only after your prescription is approved
Free shipping over $350 · compounded in a U.S. pharmacy
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Frequently paired with

Detox
Glutathione
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The Master Antioxidant

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$152 / mo

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Anti-Aging
Epitalon
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Epitalon

The Longevity Peptide

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$175 / mo

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Anti-Aging
NAD+
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NAD+

The Cellular Energy Coenzyme

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$175 / mo

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What it supports

  • Enhanced immune system function
  • Increased T-cell production and activity
  • Better response to vaccines
  • May support cancer treatment outcomes
  • Reduced frequency of infections
  • Modulates inflammatory responses
  • Supports chronic infection management

The details

Administration
Subcutaneous injection
Format
5mg/mL, 5mL vial
Typical dosing
1.6mg subcutaneously 2-3 times weekly
Best for
Immune resilience, vaccine enhancement, recovery
Pairs well with
Epitalon, Selank, NAD+
Mechanism
Thymosin Alpha-1 stimulates T-cell differentiation and function, increases natural killer cell activity, and modulates cytokine production. It helps balance immune responses without causing overactivation, training the immune system to respond appropriately.

How it works

Signal

Thymosin Alpha-1 is given as a subcutaneous injection a few times a week, on a provider-determined schedule.

Cellular response

TA-1 stimulates T-cell differentiation and function, increases natural-killer-cell activity, and modulates cytokine production. It helps balance immune responses without overactivation — training the immune system to respond appropriately rather than just turning everything up.

Outcome

Over the following weeks most people notice steadier energy and feeling less run-down first (weeks 1–2), then fewer sick days and infections that resolve faster (weeks 2–4), then a measurable drop in how often they get sick — closer to how their immune system worked a decade ago (weeks 4–12).

Sources & references

  • 30 years of clinical evidence (review)

    Dominari A et al. World J Virol. 2020;9(5):67–78.

    View source

  • Flu-vaccine enhancement: 19% → 6% infection rate

    Ershler WB et al. Ann N Y Acad Sci. 2007;1112:375–384.

    View source

  • Sepsis meta-analysis: reduced mortality

    Liu F et al. BMC Infect Dis. 2016;16:488.

    View source

  • Thymosin alpha-1 in viral hepatitis treatment

    Journal of Hepatology, 2001

    View source

  • Thymalfasin immunomodulatory effects

    Expert Opinion on Biological Therapy, 2018

    View source

  • Adjunct therapy in cancer and immune-compromised patients

    Annals of the New York Academy of Sciences, 2012

    View source

  • Thymosin alpha-1 in severe COVID-19 outcomes

    International Immunopharmacology, 2020

    View source

Common questions

Important safety information

Thymosin Alpha-1 is available by prescription only and is dispensed after a licensed provider reviews your medical screening and determines it is appropriate for you. Compounded medications are prepared by a licensed U.S. pharmacy and are not FDA-approved products. Tell your provider about your full medical history and any medications you take.

  • • Generally very well tolerated
  • • Rare injection site reactions
  • • Monitor in autoimmune conditions
  • • Requires licensed provider supervision