Thymalin vs VIP
Which should you choose? Here's what you need to know.
The short answer
Thymalin and VIP are both immune / inflammation peptides, but they work differently. A bioregulatory peptide extracted from the thymus gland. Studied for immune system regulation and potential anti-aging effects on immune function. Vasoactive Intestinal Peptide, a neuropeptide with potent anti-inflammatory and immunomodulatory effects. Studied for mast cell conditions and gut health. Compare vendor pricing and availability below.
On 20 Sep 2026 Peptide Compare tracked 18 vendors selling Thymalin, cheapest in stock $2.00 per mg at Ruo Bio, and 30 selling VIP, cheapest $3.90 per mg at Peptides Collective.
Thymalin
Immune / InflammationA bioregulatory peptide extracted from the thymus gland. Studied for immune system regulation and potential anti-aging effects on immune function.
VIP
Immune / InflammationVasoactive Intestinal Peptide, a neuropeptide with potent anti-inflammatory and immunomodulatory effects. Studied for mast cell conditions and gut health.
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.
Thymalin
VIP
$40.00
Starting from
$34.99
$7.49
Avg. price per mg
$11.96
18
Vendors selling it
30
17 options
In stock now
28 options
7.6/10
Top trust score
9.0/10
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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.