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— Immune · Pricing Guide · 2026

How Much Does Thymosin Alpha-1 Cost?

Thymosin Alpha-1 is a naturally occurring thymic peptide that regulates T-cell function. Its brand-name form (Zadaxin) is approved in over 30 countries; compounded thymosin alpha-1 is prescribed in the US for immune-support protocols.

— Medication

$249 all-in

Compounded vial from an FDA-registered US pharmacy, one monthly fill

— Physician

Included

Review and ongoing care — no consult fee, no visit fee

— Shipping

Included

Sterile syringes and alcohol prep pads in the box

— Messaging

Unlimited

Message your care team any time — no membership fee

Thymosin Alpha-1 (Injectable) — pepti Pen
Thymosin Alpha-1Vial $249 · Pen $339

Same medication in a pre-filled cartridge. Injector pen included free with your first order.

— The price

What you’re paying for.

At Pepti, Thymosin Alpha-1 is $249 per monthly fill, all-in: the compounded medication from an FDA-registered US pharmacy, physician review and ongoing care, shipping, and unlimited messaging. There is no membership fee, no consult fee, and no visit fee on top. It is available as a standard vial for $249 or as a pre-filled pepti Pen for $339; the injector pen itself is included free with your first pen order. Thymosin alpha-1 is a longer, more expensive peptide to synthesize than most recovery peptides.

— Insurance

Paying for Thymosin Alpha-1.

Insurance / Medicare
Not covered
HSA / FSA
Usually accepted
Consult or membership fee
None

Compounded Thymosin Alpha-1 is a cash-pay prescription and is not covered by insurance or Medicare. HSA and FSA funds can usually be applied.

— Common questions

Thymosin Alpha-1 pricing,
answered.

Thymosin Alpha-1 costs $249 per month at Pepti as a vial, or $339 as a pre-filled pepti Pen. That price is all-in — it includes the compounded medication, the licensed physician who reviews your assessment and manages your care, shipping to your door, and unlimited messaging with your care team. Refills are the same price each month; there is no separate membership, consult, or visit fee.

— More questions26 more questions about Pepti, answered.

Thymosin Alpha-1 is a naturally occurring peptide that plays a critical role in immune system regulation. It enhances the function of T-cells, dendritic cells, and natural killer cells. FDA-approved in over 35 countries for hepatitis B and C, and widely used off-label for immune support in chronic infections, autoimmune conditions, and as an adjunct to cancer immunotherapy. Thymosin Alpha-1 is prescription-only at Pepti: a licensed physician reviews your assessment and, if appropriate, prescribes it to be compounded by a state-licensed, FDA-registered pharmacy.

Ready to start with Thymosin Alpha-1?

Free intake review by a licensed physician. Medication refunded if not approved.

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