What does thymosin alpha-1 cost in each channel?
Prices in US dollars at the verification date. Ranges are published list or program prices where a primary source exists; notes say when a figure is a typical market range instead.
| Channel | Price (USD) | Notes |
|---|---|---|
| With insurance | Not published | Not covered. Medicare Part D and commercial pharmacy benefits cover FDA approved drugs for accepted indications; compounded or unapproved peptides are paid in cash. [3] |
| Compounded pharmacy | Not published | No lawful compounded price. Thymosin alpha-1 was placed on 503A Category 2 in 2023 and the nomination was later withdrawn, so it has no active nomination and is not on the bulks list. Products sold as research chemicals are not lawful for human use and are unverified for identity or purity. [1] [2] |
What is the list price of thymosin alpha-1?
There is no US list price. It is approved abroad as Zadaxin (thymalfasin) and sold by prescription in those countries, but it is not FDA approved and personal importation is not a licensed US channel.
Does insurance cover thymosin alpha-1?
Not covered; there is no approved or lawfully compounded US product to cover.
What changes the price?
- Absence of any lawful compounding basis since the 2023 Category 2 placement and later withdrawal
Frequently asked questions
How much does thymosin alpha-1 cost without insurance?
No lawful compounded price. Thymosin alpha-1 was placed on 503A Category 2 in 2023 and the nomination was later withdrawn, so it has no active nomination and is not on the bulks list. Products sold as research chemicals are not lawful for human use and are unverified for identity or purity. [1] [2]
Does insurance cover thymosin alpha-1?
Not covered; there is no approved or lawfully compounded US product to cover. [3]
What is the list price of thymosin alpha-1?
There is no US list price. It is approved abroad as Zadaxin (thymalfasin) and sold by prescription in those countries, but it is not FDA approved and personal importation is not a licensed US channel.
Related pages
- Thymosin alpha-1: evidence, legality, and access
- Thymosin alpha-1 vs TB-500 (thymosin beta-4) (TB-500 (thymosin beta-4) cost)
- Thymosin alpha-1 vs thymulin
- Inflammation and inflammatory bowel disease: peptide evidence
- Immune support and immune deficiency: peptide evidence
- Where it is legal to get: peptide law by state
- Full cost index
From the blog
- Thymosin alpha-1 access: approved abroad, not in the US
Thymosin alpha-1 is approved as Zadaxin in more than 30 countries but has never been FDA approved, and US compounding has no lawful basis. What that means for access, forms, and thymalin.
Sources
- [1]FDA: Certain bulk drug substances for use in compounding may present significant safety risks (Category 2 list and withdrawn nominations, content current as of April 22, 2026)FDA
- [2]FDA: Bulk drug substances used in compounding under section 503A of the FD&C Act (links to the Category 1, 2, and 3 lists and the bulks list)FDA
- [3]Medicare.gov: prescription drug coverage (Part D and outpatient drugs)