TB-500·ARIZONA·VERIFIED MAY 13, 2026
Is TB-500 legal in Arizona?
CAVEATS APPLY
No FDA approval; WADA S2 prohibited; PCAC vote on 503A bulks scheduled July 23, 2026; FDA Warning Letters target retail peptide vendors. No state-level peptide restrictions beyond federal law in Arizona.
CATEGORY · NO APPROVAL
Full status breakdown
FEDERAL · STATE · SPORT-BODYFederal status
FDA approval
no approval
DEA scheduling
not scheduled
503A compounding
FDA Warning Letters
Shortage status
not currently on shortage list
Sale framing
Research-use-only posture: FDA rejects RUO defense for TB-500; Warrior Labz and US Chem Labs are direct precedents.
Personal possession: Not federally scheduled; not federally criminalized for end-user possession. Seller risk is high.
Arizona — state-specific
Sport-body status
WADA 2026
on prohibited list · class S2 · both
S2 (growth factors / tissue repair peptides); also S0 (non-approved substance).
USADA
banned
NCAA
banned
What we couldn’t verify
Also known as
5 ALIASESTB-500 is also marketed or referenced under the following names (vendor pseudonyms, brand names, chemical identifiers):
Thymosin Beta-4 fragmentTB4 fragmentTB-500 acetateThymosin β4 fragment 17-23LKKTETQ peptide
Related
FOLLOW-ONS- Back to peptide legality lookup — pick a different compound or state
- TB-500 research guide — mechanism, dosing math, vendor audits, COA data
- 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?
TB-500 legality in other US states
State-by-state legal status for the same compound. Federal classification holds, state law varies.
Is TB-500 legal in Alabama?Is TB-500 legal in Alaska?Is TB-500 legal in Arkansas?Is TB-500 legal in California?Is TB-500 legal in Colorado?Is TB-500 legal in Connecticut?Is TB-500 legal in Delaware?Is TB-500 legal in District of Columbia?Is TB-500 legal in Florida?Is TB-500 legal in Georgia?Is TB-500 legal in Hawaii?Is TB-500 legal in Idaho?Is TB-500 legal in Illinois?Is TB-500 legal in Indiana?Is TB-500 legal in Iowa?Is TB-500 legal in Kansas?Is TB-500 legal in Kentucky?Is TB-500 legal in Louisiana?Is TB-500 legal in Maine?Is TB-500 legal in Maryland?Is TB-500 legal in Massachusetts?Is TB-500 legal in Michigan?Is TB-500 legal in Minnesota?Is TB-500 legal in Mississippi?Is TB-500 legal in Missouri?Is TB-500 legal in Montana?Is TB-500 legal in Nebraska?Is TB-500 legal in Nevada?Is TB-500 legal in New Hampshire?Is TB-500 legal in New Jersey?Is TB-500 legal in New Mexico?Is TB-500 legal in New York?Is TB-500 legal in North Carolina?Is TB-500 legal in North Dakota?Is TB-500 legal in Ohio?Is TB-500 legal in Oklahoma?Is TB-500 legal in Oregon?Is TB-500 legal in Pennsylvania?Is TB-500 legal in Rhode Island?Is TB-500 legal in South Carolina?Is TB-500 legal in South Dakota?Is TB-500 legal in Tennessee?Is TB-500 legal in Texas?Is TB-500 legal in Utah?Is TB-500 legal in Vermont?Is TB-500 legal in Virginia?Is TB-500 legal in Washington?Is TB-500 legal in West Virginia?Is TB-500 legal in Wisconsin?Is TB-500 legal in Wyoming?