Yes: three rated vendors that sell thymosin alpha-1 (TA1) accept a PeptideChecked code, and Ascension Peptides' AFFILIATE50OFF saves the most, at 50% off a first order. Without a code, PSPeptides was cheapest at $54.99 for 10mg, or $49.49 with CHECKED. We last checked these codes on September 26, 2026 (PSPeptides, Ascension) and September 28, 2026 (Licensed Peptides); we didn't re-test them at checkout for this page.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice.
Thymosin alpha-1 prices and codes
Single-vial prices checked October 7, 2026, including any displayed sale price. "After code" is arithmetic, not a checkout quote. Vendors appear in our editors' order, which isn't sorted by score.
| Vendor | Size | Price | $/mg | Code | After code |
|---|
| NextGenPeps | 10 mg | $67 (was $84) | $6.70 | No public code we verified | - |
| PSPeptides | 10 mg | $54.99 | $5.50 | CHECKED (10%) | $49.49 |
| Ascension Peptides | 10 mg | $71 (was $99.99) | $7.10 | AFFILIATE50OFF (50%, first order) | $35.50 |
| Peptide Plugs | 10 mg | $60 | $6.00 | No public code we verified | - |
| Licensed Peptides | 5 mg | from $61.99 | $12.40 | Affiliate5 (5%) | $58.89 |
| Alpha Pro Peptides | 5 / 10 mg | $49.99 / $69.99 | $10.00 / $7.00 | No public code we verified | - |
Sources: NextGenPeps, PSPeptides, Ascension, Peptide Plugs, Licensed Peptides, Alpha Pro 10mg and 5mg.
Only CHECKED, AFFILIATE50OFF and Affiliate5 are codes. For the other three vendors, we found no public code we could verify, and we don't copy codes from coupon aggregator sites. Vendor scores: NextGenPeps 8.8, PSPeptides 8.5, Ascension 8.1, Peptide Plugs 7.5, Licensed 7.4, Alpha Pro 6.3.
Disclosure: PeptideChecked has affiliate relationships with PSPeptides, Ascension Peptides and Licensed Peptides. We may earn a commission if you buy through our links or use these codes. That doesn't change any rating, which comes only from our published method.
What each vendor offers on TA1
- Ascension Peptides: AFFILIATE50OFF is for a first order. Ascension's partner page says the discount "can vary from partner to partner as well as special promotions." The TA1 page lists volume pricing down to $63.90 a vial at 10 vials and links a Kovera Labs certificate (batch 33-05260628, May 26, 2026) and an older MZ Biolabs report. Details: Ascension Peptides coupon code.
- PSPeptides: CHECKED takes 10% off. PSPeptides doesn't publish coupon terms we could find. Details: PSPeptides coupon code.
- Licensed Peptides: Affiliate5 takes 5% off, but TA1 comes in 5mg vials, so it's the most expensive per mg here even after the code. The product page's price blocks conflicted on October 7, 2026 ($61.99, $43.78 and $42.58 per vial all appeared), so check the cart total. Its certificate is a Vanguard report; the page says "All 15 residues confirmed" for a 28-residue peptide. Details: Licensed Peptides coupon code.
- NextGenPeps: no code, but TA1 showed a sale price, and the vendor offered 10% off a first order for email sign-up when we last checked on September 26, 2026.
- Peptide Plugs: no code, but volume pricing runs from 5% off at 2 vials to 40% off ($36 a vial) at 10 or more.
- Alpha Pro Peptides: no code, but the site showed a "Buy 1 Get 1 Free" banner on October 7, 2026. Its testing page lists TA1 certificates for the 5mg vial only.
How to apply a code
- Go to the vendor through our link, or type its address.
- Add thymosin alpha-1 to your cart.
- Enter the code in the coupon or discount-code field at checkout.
- Confirm the discount line appears before you pay.
If it doesn't apply, check for a typo, a sale item the vendor excludes, or (for Ascension) a previous order. Codes and terms are set by the vendor and can change at any time. We can't apply or honor codes ourselves.
Terms we couldn't confirm
None of PSPeptides, Ascension or Licensed Peptides publishes stacking rules we could find. We couldn't confirm whether these codes apply on top of sale or volume prices. Treat the checkout total as the answer.
Before you use a discount
Our thymosin alpha-1 vendor comparison found PSPeptides and Peptide Plugs document TA1 best: PSPeptides posts an August 2026 North American Diagnostics certificate with a batch number and a safety panel, and Peptide Plugs gives a Freedom Diagnostics accession code (Pept2607220354), though its lot field reads "Red." No vendor had independent Finnrick data for TA1. Don't confuse TA1 with TB-500, which relates to thymosin beta-4 (best TB-500 vendors). Check the COA for your lot with our COA guide and COA checklist.
See every vendor's current offer on our peptide coupon codes hub, or the full best peptide vendors in the USA ranking.
Try PSPeptides: 10% off with code CHECKEDCode CHECKED · 8.5/10 overall
Visit PSPeptides
Try Ascension Peptides: 50% off first order with code AFFILIATE50OFFCode AFFILIATE50OFF · 8.1/10 overall
Visit Ascension Peptides
