Welli Labs is a US research-peptide vendor that lists 57 injectable peptides and 7 blends, including BPC-157, Thymosin Alpha-1 and TB-500. Across 57 products with a market median, its prices sit 33% below the median for the same peptide and vial size; it is the cheapest vendor we track on Semaglutide and Tirzepatide, and pricier on PE-22-28 and Oxytocin. We found certificates for around some of the in-stock products we track. Based on the certificates our crawler found; vendors may publish more than we index. Shipping is free over $150; it accepts card, crypto and ACH. It does not accept returns.
Facts extracted from the vendor’s site and not yet reviewed by us.
COA coverage: Partial
We found certificates for around some of the in-stock products we track. Based on the certificates our crawler found; vendors may publish more than we index.
from 52 indexed documents
current certificates, by the date printed on them
Freedom Diagnostics signs the most of them
oldest Nov 22, 2025
Every batch is tested for identity, quantity, endotoxin, heavy metals, and (for bacteriostatic water) pH, with a Certificate of Analysis and a unique, order/batch-number-searchable traceability record provided for each batch.
$3/mg median
▼ 14%
Median price per mg across Welli Labs’s 44-57 priced listings, from Jul 17 ($3.50/mg) to Oct 14 ($3/mg) over 86 observed days. The mix of products behind the median changes as listings come and go, so this tracks the catalog as well as the prices.
4 of Welli Labs’s tracked listings changed price in the last 30 days: 4 down, 0 up.
Listed prices at Welli Labs against the median price per mg for the same peptide at the same vial size, across every vendor we track. Vendors change prices without notice, so check the current listing before you order.
Below the market median on 33 of 35 comparable listings, above it on 2. Typical listing: 33% below market. Showing the 6 largest differences.
International
33% below
vs market median
37
peptides
Partial
in-stock products
Oct 14
International
8% above
vs market median
63
peptides
None found
in-stock products
Oct 14
International
3% above
vs market median
52
peptides
Partial
in-stock products
Oct 14
International
21% below
vs market median
48
peptides
Broad
in-stock products
Oct 14
Welli Labs sits 33% below market the tracked market median on matched peptide/size rows. The catalog in this index is smaller than Peptides Greyhouse's. On COA coverage, Welli Labs rates partial and Peptides Greyhouse rates none found. Based on the certificates our crawler found; vendors may publish more than we index.
The honest comparison unit is price per mg on matched peptide/size rows. COA coverage is presence of a current indexed document, not purity-as-quality. See the Evidence Atlas and how to read a COA.
Evidence boundary: Listed prices, stock signals, and indexed COA documents are observations. They do not establish legitimacy, authenticity, safety, sterility, chain of custody, product quality, fulfillment, or suitability. No vendor is endorsed.
Pricing data cannot settle that question, and we do not test products or verify fulfillment. Here is the evidence we do hold for Welli Labs. We found certificates for around some of the in-stock products we track. Those certificates were signed by 2 labs, the newest tested August 4, 2026. Based on the certificates our crawler found; vendors may publish more than we index. We have been recording their prices since July 4, 2026. Read each certificate yourself, check that its lot and compound match what you are buying, and treat anything we have not recorded as unknown rather than as an answer.
We found certificates for around some of the in-stock products we track. The freshest was tested August 4, 2026. Based on the certificates our crawler found; vendors may publish more than we index. Their own testing page is at https://wellilabs.com/coa-verify/. A certificate on file records what a document says; it cannot prove chain of custody or what is in the vial you receive.
Welli Labs states that orders ship from US. They state that they ship internationally. This is what the vendor says about itself, not something we have verified.
We have not recorded a shipping cost for Welli Labs. Orders over $150 are listed as shipping free. Their shipping page is at https://wellilabs.com/other-policies/. Checkout is the only place these figures are binding.
At the time we recorded it, Welli Labs listed credit or debit card, cryptocurrency and ACH bank transfer. Peptide storefronts change processors often, so the options at checkout may differ from what we hold.
We have none on record for Welli Labs. When a code we can verify appears, it shows on this page and the prices here are adjusted for it; until then, every figure on this page is the list price.
Across 57 graded products, Welli Labs's median price per mg sits 33.4% below the median for the same peptide at the same vial size. We track 40 products from them in total. Price per mg is the comparison unit: a cheaper vial holding less is not a cheaper product.
Product documentation
Across the tracked peptide products we hold for Welli Labs, COA coverage rates partial. The public index contains 52 documents. Reported test dates in this set run from Nov 22, 2025 through Aug 4, 2026. That rating covers the full tracked catalogue for Welli Labs, including products that are currently out of stock, so it can differ from the in-stock rating above. Based on the certificates our crawler found; vendors may publish more than we index.
across the full tracked catalogue
current certificates, by the printed test date.
Printed date is over 18 months old.
Named on more current records than any other lab.
Certificate assessment
10 evaluated certificates
10 graded · 0 not graded · 9 in the A range.
The sample prioritizes up to ten popular peptides from this vendor. Grades assess the document and its reported tests, not the vendor’s whole catalog or the safety of a product.
Automated checks can make mistakes. Open “Why this result?” for the reason and any review notice, and check the linked COA’s lot against your product. How grading works
10 evaluated records
Document grade
X2: The certificate's identity evidence (Identity (HPLC-RTM) Retatrutide) can't confirm the peptide on its own; that needs mass spectrometry or a side-by-side match to a reference standard.
Document check: fail.
Lab record: not confirmed.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLRT-50-1005
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLMTS-10-1007
Document grade
C3: We couldn't confirm this certificate against the lab's own records, so the grade stops at A-.
Document check: flag.
Lab record: not confirmed.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLCND-5.10001
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
GHK:100-01-10004
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLLKPV-10-10003
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WNLAD-500-10002
Document grade
B3: Most of the evidence is there, but identity isn't confirmed, so the grade stops at A-.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLTB-10-10001
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLTS-A-10-10004
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLBPC-10-10002
Document grade
B2: Identity, purity and amount are supported, and the lab's own records match this certificate.
Document check: flag.
Lab record: matched.
Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2
WLSMX-10-10001
| COA grade | Printed lab | Certificate | |||
|---|---|---|---|---|---|
| Retatrutide Lot: WLRT-50-1005 | Document grade Why this result?X2: The certificate's identity evidence (Identity (HPLC-RTM) Retatrutide) can't confirm the peptide on its own; that needs mass spectrometry or a side-by-side match to a reference standard. Document check: fail. Lab record: not confirmed. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | ILS Laboratories | Aug 4, 2026 | 99.9%99.5%+ | View COA |
| MOTS-c Lot: WLMTS-10-1007 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Apr 25, 2026 | 99.43%99.0–99.49% | View COA |
| CJC-1295 (no DAC) Lot: WLCND-5.10001 | Document grade Why this result?C3: We couldn't confirm this certificate against the lab's own records, so the grade stops at A-. Document check: flag. Lab record: not confirmed. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Feb 26, 2026 | 99.75%99.5%+ | View COA |
| GHK-Cu Lot: GHK:100-01-10004 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | FREEDOM DIAGNOSTICS | Feb 17, 2026 | 99.53%99.5%+ | View COA |
| KPV Lot: WLLKPV-10-10003 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Feb 17, 2026 | 99.26%99.0–99.49% | View COA |
| NAD+ Lot: WNLAD-500-10002 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Feb 7, 2026 | 99.89%99.5%+ | View COA |
| TB-500 Lot: WLTB-10-10001 | Document grade Why this result?B3: Most of the evidence is there, but identity isn't confirmed, so the grade stops at A-. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Feb 7, 2026 | 99.28%99.0–99.49% | View COA |
| Tesamorelin Lot: WLTS-A-10-10004 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Feb 7, 2026 | 98.8%Under 99% | View COA |
| BPC-157 Lot: WLBPC-10-10002 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Jan 21, 2026 | 99.48%99.0–99.49% | View COA |
| Semax Lot: WLSMX-10-10001 | Document grade Why this result?B2: Identity, purity and amount are supported, and the lab's own records match this certificate. Document check: flag. Lab record: matched. Graded Oct 14, 2026 · Grader 0.4.9 · Policy 2026-10-07.2 | Freedom Diagnostics | Nov 25, 2025 | 98.637%Under 99% | View COA |
21 current records
WLRT-50-1005
WLMTS-10-1007
WLLIGF1-L1004
WLCND-5.10001
WLOXT-10-10001
WLCAG-05-10001
WLEPI-10-10001
GHK:100-01-10004
WLLKPV-10-10003
WLDSP-S-10001
WLMDT-10-10001
WNLAD-500-10002
WLLGLP1-S-10001
WLTB-10-10001
WLTS-A-10-10004
WLLTA-1-10-10001
WLTZ-20-10002
WLBPC-10-10002
WLSMX-10-10001
A record appears on file after our pipeline identifies the document as a certificate of analysis and matches its printed compound to a catalog peptide. The record cannot prove authenticity, chain of custody, sterility, product safety, or suitability for use.
These are counts of documents in our index, and a coverage rating of what our crawler found. They do not grade vendor quality, legitimacy, or safety. Printed fields can contain transcription errors. “Older record” means the reported test date is more than 18 months old.
See the testing methodology and dataset, or compare this coverage against another vendor in the vendor comparison tool.
The Peptide App. Welli Labs peptide prices, COA coverage and vendor facts. Updated October 14, 2026. https://www.thepeptide.app/pricing/vendor/welli-labs
The Peptide App. (2026). Welli Labs peptide prices, COA coverage and vendor facts. Retrieved from https://www.thepeptide.app/pricing/vendor/welli-labs
Prices and certificate counts on this page were last refreshed October 14, 2026.
