Checked October 21, 2026 · 10 vendors

Cortagen for sale: prices from 10 vendors (October 2026)

Synthetic tetrapeptide (Ala-Glu-Asp-Pro) bioregulator studied in brain-cortex models. Where to buy it for research: every US vendor we track that sells Cortagen, cheapest per milligram first, with COA status. The lowest in-stock price this week is $2.10/mg at Go Alpha Labs.

Lowest per mg: $2.10; Go Alpha Labs
Median per mg: $2.75; 7 in stock
Cheapest with COA: —; none yet
Vendor publishes COAs: 0%; of in-stock offers

Cortagen prices, cheapest per mg

▼ cheaper / ▲ dearer than last week

1
Go Alpha Labs4.2
Cortagen 20mg
No COA
$41.99~~$59.99~~
20 mg
$2.10/mg
New
Check price
goalphalabs.com
2
Swiss Chems7.2
Cortagen 20mg
No COA
$46.95~~$65.00~~
20 mg
$2.35/mg
New
Check price
swisschems.is
3
Amino USA4.7
Cortagen 20mg
No COA
$50.00~~$55.00~~
20 mg
$2.50/mg
New
Check price
aminousa.com
4
Pura Peptides1.0
Cortagen 20mg
No COA
$55.00~~$90.00~~
20 mg
$2.75/mg
New
Check price
purapeptides.com
5
Core Peptides6.5
Cortagen 20mg
No COA
$59.00
20 mg
$2.95/mg
New
Check price
corepeptides.com
6
Orbitrex Peptides6.5
Cortagen 20mg
No COA
$59.99
20 mg
$3.00/mg
New
Check price
orbitrexpeptide.is
7
Raw Amino1.0
Cortagen 20mg
No COA
$63.00
20 mg
$3.15/mg
New
Check price
rawamino.com
–
Verified Peptides6.0
Cortagen 20mg
No COAOut of stock
$55.00
20 mg
$2.75/mg
New
Check price
verifiedpeptides.com
–
BioLongevity Labs5.5
Cortagen 20mg
No COAOut of stock
$69.97
20 mg
$3.50/mg
New
Check price
biolongevitylabs.com
–
LabFirst Peptides6.0
Cortagen 20mg
No COAOut of stock
$85.00
20 mg
$4.25/mg
New
Check price
labfirstpeptides.com

Prices are the vendor's list price for one vial on the check date, in USD, before shipping. Ranked by price per mg; vendors that only sell multi-vial kits are listed after single-vial prices, at the per-vial price; sponsorship never changes the order. Links marked "Check price" may earn us a commission.

Cortagen price history

Price history starts with our first weekly check. Each re-check adds a point here, so the chart fills in week by week.

Research use only. The compounds referenced on this page are sold for laboratory research purposes only. They are not drugs, foods, cosmetics or dietary supplements, and they are not approved by the FDA for human or veterinary use. Nothing on this page is medical advice. PeptideChecked does not sell peptides, does not provide dosing guidance, and does not recommend the use of any compound in humans.

FAQ

Cortagen price questions

Where can I buy Cortagen for research?

We track 7 US vendors with Cortagen in stock as of October 21, 2026, listed above from cheapest per mg. Before ordering, open the vendor's review for its testing record and check that a COA exists for the exact lot. Cortagen sold this way is labeled for laboratory research only.

Where is Cortagen cheapest?

On October 21, 2026, the lowest Cortagen price per mg among in-stock vendors was Go Alpha Labs at $2.10/mg ($41.99 for 20 mg).

How much does Cortagen cost per mg?

The median across 7 in-stock vendors was $2.75 per mg on October 21, 2026, with a range of $2.10 to $3.15.

How often are Cortagen prices checked?

Weekly. We read each Cortagen price from the vendor's own product page and save every check, so each row shows the change since last week. The last check was October 21, 2026.

What does the COA badge mean on Cortagen listings?

The vendor publishes certificates of analysis (lab reports) for its products on its own site. 0% of the in-stock offers above come from vendors that do. Check that a report exists for the exact product and lot you order: a COA shows what a lab measured for one batch, not a guarantee about the vial you receive.