The Immune-Support Peptide

Thymosin Alpha-1

Discuss immune-health concerns with a nurse practitioner.

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3 Locations
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16 Years in Business

How It Works

  1. Decide which peptide you think is right for you. Not sure which one? Our nurse will help you choose.
  2. Link up with us on the phone or video. Pick a time with our nurse, then fill out a short health form (about 10 minutes). If it’s right for you, you can get your prescription the same day, on the call.
  3. Get the product shipped to your house, or pick it up in the store. Then we’ll discuss the best way for you to get it, whether you pick it up at our clinic or have it shipped to your house at no extra charge.

Thymosin Alpha-1: $199

Your telehealth visit is free. If you buy, we add a $49 medication review for your prescription.

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Nothing to pay to book. California residents only.

Prescribed here. Filled by a pharmacy.

By Phone

Our nurse calls you at the time you pick, wherever you are in California. Pick it up at Calabasas, Santa Monica or West Hollywood, or have it shipped home.

Filled by a Licensed Pharmacy

Your prescription is filled by a licensed U.S. 503A pharmacy.

Prescription Only

Nothing is dispensed without a prescription from our medical team.

How Much Does Thymosin Alpha-1 Cost?

Every order adds one $49 medication review. Free delivery anywhere in California, or pick it up at any clinic.

Is Thymosin Alpha-1 Right for You?

Thymosin Alpha-1 is prescription-only and considered after a provider reviews your health picture. It is most relevant to people focused on immune resilience.

Adults focused on immune support and healthy aging

People who feel run down through demanding seasons

Anyone building a preventive wellness plan with a provider

Start with a free consultation with our medical team to see whether it fits.

What Thymosin Alpha-1 Is Studied For

Thymosin Alpha-1 is studied for immune resilience and age-related immune decline.

It’s made naturally by your thymus gland, which trains your immune system.

Immune-system modulation and balance

Maturation of T-cells and natural-killer-cell activity

Support during the age-related decline in immune function

A steadier inflammatory response

What the Research Shows

Thymosin alpha-1 has been tested in controlled trials in people, mostly in Asia, for hepatitis B, sepsis and other serious illnesses.

1977, Calf Thymus (PNAS)

Researchers isolated thymosin alpha-1 from calf thymus, found it is 28 amino acids long, and proposed that it may help regulate the immune cells called T cells.
1977 study on PubMed

2025, 1,106 Adults With Sepsis (BMJ)

In a placebo-controlled trial, thymosin alpha-1 injected under the skin didn’t lower deaths at 28 days (23.4% vs 24.1% with placebo). Other outcomes, including side effects, didn’t differ significantly.
2025 study on PubMed

2026, Review of 10 Trials (Cochrane Database of Systematic Reviews)

Across 10 randomized trials in 1,349 adults with chronic hepatitis B, the evidence was of low to very low certainty, so reviewers couldn’t say whether it lowers deaths or serious side effects.
2026 review on PubMed

Thymosin alpha-1 is not FDA-approved for any use. These studies don’t show that it treats any condition in people, and safety data in people are limited. Your free consultation with a nurse practitioner is the place to talk through what is and isn’t known.

Important Information

Most peptides are not FDA-approved for the uses discussed publicly, and are prescribed at the discretion of a licensed provider after an individual evaluation. A peptide is not appropriate for everyone, and individual results vary.

Peptide therapy at Cienega Medical is available by prescription only. You start with a consultation with one of our nurse practitioners, who reviews your health history, your goals, and whether a peptide is appropriate for you. If it is, they write the prescription and we prepare it for your visit. If it is not, they will tell you that too.

What Is Thymosin Alpha-1?

Thymosin alpha-1 (thymalfasin) is a synthetic peptide studied in immunology research.

In the U.S. it is not FDA-approved and is classified as a research peptide.

A synthetic version is registered as a pharmaceutical in a number of other countries.

This page is for general education only.

FAQ

  • What is thymosin alpha-1, and what is it studied for?

    Thymosin alpha-1 (also written Tα1 or thymalfasin) is a 28-amino-acid peptide fragment that was first identified in extracts of the thymus gland. It is now made synthetically and has been studied in laboratory and clinical research on the immune system. A free consultation with a nurse practitioner is the place to discuss that research in relation to your immune-health concerns.

  • Is thymosin alpha-1 FDA-approved?

    No. Thymosin alpha-1 is not approved by the U.S. Food and Drug Administration. A synthetic form is registered as a pharmaceutical product in some other countries, but regulatory status differs by jurisdiction. Your nurse practitioner can explain what that means when considering a prescription at your free consultation.

  • What are the risks of thymosin alpha-1, and who should avoid it?

    Thymosin alpha-1 is not right for everyone. Your nurse practitioner reviews your health history, current medications and existing conditions before prescribing and will tell you if it is not a fit. Bring your current medication list to your free consultation.

  • What does it cost, and what is included?

    Bottle prices are listed on this page. Every order includes one medication review fee, which covers the review and managing your prescriptions, and is charged once even when prescriptions go out as separate orders the same day. The consultation itself is free.

  • How do I start?

    Pick a time for a free telehealth visit with a nurse practitioner, by phone or video. Before your visit, you fill out a short health form. They go through your health history, your current medications and what you are trying to achieve, then tell you whether this is a sensible fit. Not everyone is, and if you are, they write the prescription and you pay for your bottles plus one medication review fee.

  • Where does my prescription come from?

    Your prescription is filled by a licensed U.S. 503A compounding pharmacy.

  • How long does a bottle last, and how do refills work?

    That depends on what your provider prescribes, so it is not something we can put a number on here. Your nurse practitioner tells you at your review roughly how long a bottle should last for you and when it would make sense to order again. You can order as many bottles as your nurse prescribes while you’re on the call, and when you need more, book another call online or call us. Each call where you order adds one $49 medication review. Nothing renews on its own. If you’d like bottles sent on a regular schedule, ask your nurse: it’s worked out case by case, since everyone’s prescription is different.

  • Can I collect it or have it shipped?

    Both. Collect at West Hollywood, Santa Monica or Calabasas, where we pack it for you and show you how to inject it, all covered by the medication review fee. Or we ship it to your home anywhere in California, at no extra charge.

3 Locations In Los Angeles

Open Daily; Including Sundays

Modern medical spa lobby with marble desk, green plant ceiling, and sage green walls.
Calabasas
26787 Agoura Rd
Calabasas, CA 91302
(310) 341-2776 Location details →
Modern med spa lobby with a colorful rainbow mural, white reception desk, and a wooden surfboard on a blue wall.
Santa Monica
902 Broadway
Santa Monica, CA 90401
(310) 307-3617 Location details →
Modern medical spa reception with a green wall, floral goddess mural, neon sign, and gold ring chandelier.
West Hollywood
375 N. La Cienega Blvd
West Hollywood, CA 90048
(323) 992-0090 Location details →

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Serving LA since 2010 · 3,356 five-star reviews

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