THYMOSIN ALPHA-1·MISSISSIPPI·VERIFIED MAY 13, 2026
Is Thymosin Alpha-1 legal in Mississippi?
CAVEATS APPLY
Approved in 35+ countries as Zadaxin but not FDA-approved; PCAC voted NO Dec 4, 2024; on Category 2 list. No state-level peptide restrictions beyond federal law in Mississippi.
CATEGORY · NO APPROVAL
Full status breakdown
FEDERAL · STATE · SPORT-BODYFederal status
FDA approval
no approval · brand: Zadaxin (international)
DEA scheduling
not scheduled
503A compounding
Bulks list: voted no
Do-not-compound list: on list
PCAC voted against inclusion Dec 4, 2024. Committee acknowledged strongest international clinical evidence of any peptide reviewed (35+ country approvals, 11,000+ subjects) but concluded US evidence base inadequate. On Category 2 as of April 2026.
PCAC review history
- Dec 4, 2024 · voted no · SOURCE ↗
FDA Warning Letters
none on record for this compound
Shortage status
not currently on shortage list
Sale framing
Research-use-only posture: PCAC-rejected. International approval gap is the story — US sale is FDCA §505 violation despite EMA-equivalent foreign approval.
Personal possession: Not federally criminalized.
Mississippi — state-specific
Sport-body status
WADA 2026
not on prohibited list
Not explicitly named (thymosin beta-4/TB-500 is named separately as growth factor; thymosin alpha-1 is immunomodulator, not in S2.1).
USADA
not banned
NCAA
unknown
What we couldn’t verify
Also known as
5 ALIASESThymosin Alpha-1 is also marketed or referenced under the following names (vendor pseudonyms, brand names, chemical identifiers):
ThymalfasinZadaxinTα1SciClone thymosinTA1
Related
FOLLOW-ONS- Back to peptide legality lookup — pick a different compound or state
- Peptide pricing index — what each compound costs per mg across audited vendors
- Janoshik COA verifier — a separate question from legality: does the COA the vendor cites actually exist?
Thymosin Alpha-1 legality in other US states
State-by-state legal status for the same compound. Federal classification holds, state law varies.
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