Testagen vs Thymulin
Which should you choose? Here's what you need to know.
The short answer
Testagen and Thymulin are both bioregulator peptides, but they work differently. Testagen is a bioregulator peptide used in research. Thymulin is a bioregulator peptide used in research. Compare vendor pricing and availability below.
On 20 Sep 2026 Peptide Compare tracked 11 vendors selling Testagen, cheapest in stock $2.75 per mg at Verified Peptides, and 4 selling Thymulin, cheapest $1.85 per mg at Polaris Peptides.
Testagen
BioregulatorTestagen is a bioregulator peptide used in research.
Thymulin
BioregulatorThymulin is a bioregulator peptide used in research.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 20, 2026.
Testagen
Thymulin
$35.00
Starting from
$39.99
$3.18
Avg. price per mg
$4.68
11
Vendors selling it
4
8 options
In stock now
5 options
6.9/10
Top trust score
7.3/10
Ready to buy?
Our top-rated vendor for each, based on trust scores, purity testing, and price.
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.