What is thymosin alpha-1?
Thymosin alpha-1 (TA1) is a peptide first isolated from the thymus that affects immune signaling. A version called thymalfasin is approved in some countries outside the U.S.
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Labeled vial · actual packaging may differ
CLINICIAN-SUPERVISED CARE
A thymic peptide studied in immune signaling.
Thymosin Alpha-1 monthly plan
Thymosin Alpha-1 is a peptide investigated for effects on immune signaling in a variety of clinical and research settings.
You'll start your medical questionnaire next. Prescription required. Treatment is subject to medical eligibility, provider approval, pharmacy availability, patient location, and applicable law.
UNDERSTAND THE TREATMENT
Thymosin Alpha-1 is a peptide investigated for effects on immune signaling in a variety of clinical and research settings. Evidence depends on the population, formulation, and condition being studied.
The starting point is your health history and the reason you are seeking care—not a dosing schedule found online. Your clinician can assess whether a treatment discussion is appropriate and whether a better-studied option makes more sense.
WHAT PEOPLE ASK
Thymosin alpha-1 (TA1) is a peptide first isolated from the thymus that affects immune signaling. A version called thymalfasin is approved in some countries outside the U.S.
No. It is not FDA-approved in the U.S., and FDA identifies inadequate safety information for the proposed compounded drug, including potential immune reactions.
Thymosin Alpha-1 is $255 a month on a one-month plan. That includes the online consultation, the clinician review, supplies, and two-day shipping once the pharmacy dispenses. Three-, six- and twelve-month plans are offered at checkout. If the clinician decides treatment is not appropriate for you, your payment is refunded. See what peptide pricing includes.
Yes, through a clinician review. You complete an online health assessment, a licensed clinician reviews it (a phone call may be needed) and decides whether Thymosin Alpha-1 is appropriate. If it is prescribed, a licensed U.S. compounding pharmacy prepares it and ships it to you. Peps RX serves patients in all 50 states; a prescription is never guaranteed.
NO FINE-PRINT MATH
The formulation, the vial, and the monthly price—kept separate, so you can compare clearly.
Specifications are not dosing instructions. Follow only the directions provided by your clinician and dispensing pharmacy.
What a licensed U.S. compounding pharmacy means for your prescription, and what it does not.

Peps RX prescriptions are compounded by a state-licensed U.S. 503A pharmacy for the individual patient named on the prescription. That is a different pathway from products sold “for research use only,” which are not made or labeled for use in people.
Injectable preparations are sterile preparations. USP <797> is the national standard for compounding them, covering cleanroom conditions, personnel garbing, and beyond-use dating, and state boards of pharmacy enforce it.
Compounded drugs are not FDA-approved. FDA does not review them for safety, effectiveness, or quality before they are dispensed, and state boards of pharmacy are primarily responsible for overseeing 503A pharmacies.
Your prescription label names the dispensing pharmacy. You can confirm its license on that state’s board of pharmacy website. How to verify a compounding pharmacy.
HOW IT WORKS

Tell us about your preferences, goals, medications, and health history to see if Thymosin Alpha-1 may be right for you.

A state-licensed clinician reviews your intake and, if appropriate, creates a Thymosin Alpha-1 treatment plan personalized for you.*

If prescribed, your Thymosin Alpha-1 treatment is prepared by a licensed pharmacy and shipped to your home with supplies. Follow the instructions provided by your clinician and pharmacy.
*Results may vary. All prescription-grade therapies require a prescription from a licensed provider and are prepared by licensed pharmacies. Compounded medications are not FDA-approved, and the FDA does not review them for safety, efficacy, or quality. Medical guidance is provided solely by healthcare professionals, not Peps RX or its distributors. Content is for informational purposes only and should not be taken as medical advice, diagnosis, or treatment.
THE DETAILS MATTER
The displayed monthly price includes the asynchronous consultation, supplies, and two-day shipping after dispensing. Your medical questionnaire starts the process; a licensed clinician independently determines whether treatment is appropriate.
Your dose is determined by the prescribing clinician from your intake form, health history, current medications, and the reason you are seeking care. The strengths listed on this page are product specifications, not instructions for use. Do not calculate a protocol from this catalog or combine treatments without an individualized clinical review.
How long a vial lasts depends on the prescribed dose, schedule, formulation, and pharmacy instructions. The monthly price shown on this page describes the care plan; follow the fulfillment and use directions provided by your clinician and pharmacy.
This compounded formulation is not FDA-approved. FDA identifies inadequate safety information to fully understand the risks of the proposed compounded drug, including potential immune reactions and peptide-impurity concerns. It should not be advertised as a general immunity booster.
The listed price includes two-day shipping once the pharmacy dispenses and ships an approved prescription. It does not mean delivery two days after your first visit. Review, preparation, location, and carrier conditions affect the overall timeline.
KEEP EXPLORING
These products share a research topic. They are not a recommendation to combine treatments.
Product images show the labeled vial for identification; actual pharmacy packaging may differ. Listed strengths are specifications, not dosing instructions.
Start the clinician review process for Thymosin Alpha-1.
If prescribed, your treatment ships FREE to all 50 states.