How often do peptide vendors change their prices?
Updated from live data. Research use only. Prices, not recommendations.
Rarely. Over 147 days of daily snapshots, 120 listings out of 1,113 (11%) changed price at least once. We logged 105 increases and 115 cuts. Neither direction dominates.
The last 30 days brought 35 increases and 43 cuts. The median increase was 13% and the median cut 13%.
A few stores make most of the moves
The busiest three stores account for 85% of all price moves. Three stores with 30+ days of history did not change a single price.
| Vendor | Up | Down |
|---|---|---|
| Ascension Peptides42 listings · 147 days · 18 stock-outs | 38 | 62 |
| GenPeptide55 listings · 147 days · 2 stock-outs | 33 | 25 |
| Atomik Labz275 listings · 147 days · 22 stock-outs | 19 | 10 |
| Solution Peptides329 listings · 147 days · 12 stock-outs | 7 | 5 |
| LA Peptides61 listings · 147 days · 0 stock-outs | 8 | 1 |
| Ameano Peptides51 listings · 147 days · 0 stock-outs | 0 | 6 |
| EZ Peptides60 listings · 147 days · 2 stock-outs | 0 | 6 |
| BioLongevity Labs39 listings · 147 days · 1 stock-out | 0 | 0 |
| Omega Aminos16 listings · 147 days · 2 stock-outs | 0 | 0 |
| Swiss Chems118 listings · 147 days · 6 stock-outs | 0 | 0 |
Added too recently for a row: JD BioWorks, Mizan Supply, Peptide Basix.
Stock comes and goes as often as prices
Listings went out of stock 65 times and came back 66 times over the same window. A price alert on the peptide pages covers both.
How we measured this
We snapshot the list price and stock of every live listing once a day. This report covers May 18, 2026 to October 12, 2026: 88,665 snapshots of 1,148 listings. A move is a change between two snapshots of the same listing no more than three days apart. Snapshots are list prices before codes and shipping, so a new coupon does not count as a cut. 99 jumps of 3x or more up, or 75% or more down, are left out; those are almost always a relisted product or a corrected size, not a repricing. Stores we added recently have less history.
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