healinglongevity

Thymosin Alpha-1

Also known as Ta1, Zadaxin

Immune-modulating peptide used clinically in some countries.

Medical status: Approved in some countries as an immune therapy adjunct.

Also commonly used for (off-label)

General immune resilience
Recovery after repeated infections
Chronic inflammation protocols

Off-label and research uses are what people report, not approved indications. Talk to a clinician before using any of them.

How it's taken (route)

Subcutaneous injection
a small shot into the fat just under the skin (belly, thigh, or love handle)

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Documented dose: 1600–1600 mcg
Typical frequency: 1.6 mg twice weekly (3–4 days apart); daily for up to 2 weeks during an acute infection
Cycle: 8 weeks on, 4 off
Half-life: ~2 hours
Common vial sizes: 5 mg, 10 mg
Regulatory status: Approved outside the US; unapproved in the US.

Dose on a U-100 syringe (1600–1600 mcg)

Vial	BAC water	Draw
5 mg	1 mL	32 units
5 mg	1.5 mL	48 units
10 mg	2.5 mL	40 units
10 mg	3 mL	48 units

On a U-100 syringe, 100 units = 1 mL, and the syringe holds 100 units total. Most people keep a single subcutaneous injection under about 50 units — bigger volumes are usually mixed stronger (less water) or split into two shots. Only mixes that fit in one syringe are shown. Always double-check with the reconstitution calculator.

What it does

A peptide made naturally by the thymus gland that acts like a conductor for the immune system — waking up T cells and dendritic cells so the body responds properly to threats, while calming an over-reactive response. What people look into it for: • Immune support during chronic or recurring infections • Recovery in people who are run down or immunosuppressed • Chronic viral illness — it is used medically for hepatitis B and C in some countries • Balancing an immune system that is under- or over-reacting It is approved as Zadaxin in a number of countries and has a long safety record.

Mechanism

Enhances T-cell maturation and dendritic cell function via TLR signalling.

Storage — lyophilisedwhat's this?

Refrigerate 2-8C, protect from light.

Storage — reconstitutedwhat's this?

Refrigerate 2-8C, use within ~28 days.

Reconstitution noteswhat's this?

Common mix: 10 mg vial + 2 ml bacteriostatic water = 50 mcg per unit, so the standard 1.6 mg dose is 32 units.

Stacks well with

Popular combinations reported in the community and research literature — not a recommendation. Adding peptides multiplies side-effect risk; check with a clinician.

Commonly reported side effects

Injection-site reactions
Transient flu-like symptoms

Contraindications noted

Organ transplant recipients
Autoimmune disease (caution)
Pregnancy

Research notes

Approved in several countries as Zadaxin for hepatitis B.

Vendors carrying Thymosin Alpha-1

These research suppliers list this compound. Prices, vial sizes and testing vary — always check the current lot certificate before you buy.

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Peptide Streak does not sell peptides and is not affiliated with these vendors. Some list metabolic compounds under coded product names.