- Reported purity
- 99.202%99.0–99.49%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
Market
Z
Popular
15% below market
on 15 popular peptides
Catalog
At market price
$$ price level · 35 listings
Peptides
27
15 popular carried
COA coverage, in stock
17 of 27
63% of in-stock products · in-stock vendor median 54%
Cheapest on
- Glutathione▼ 44%
- 5-Amino-1MQ▼ 31%
- Tirzepatide▼ 25%
Pricier on
- Adipotide▲ 51%
- PEG-MGF▲ 49%
- CJC-1295 (no DAC)▲ 36%
Price check
Listed prices at Zesty Rat 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.
Adipotide5 mg vial · lowest elsewhere $6.63/mg at Genesis Peptides▲ 51%$20/mgPEG-MGF2 mg vial · lowest elsewhere $10/mg at Raven's Nest▲ 49%$34.99/mgGlutathione600 mg vial · lowest elsewhere $0.05/mg at RUO.bio▼ 44%$0.05/mgCJC-1295 (no DAC)5 mg vial · lowest elsewhere $5/mg at Raven's Nest▲ 36%$11/mgPT-14110 mg vial · lowest elsewhere $2.20/mg at Grey Axis Research▲ 33%$6/mg5-Amino-1MQ10 mg vial · lowest elsewhere $3/mg at Peptide Plugs▼ 31%$4/mg
Below the market median on 12 of 26 comparable listings, above it on 10. Typical listing: At market price. Showing the 6 largest differences.
Popular peptides
15 of 22 carriedFull catalog (27)
Product documentation
Zesty Rat COA coverage
Current certificates are on file for 17 of 27 tracked peptide products from Zesty Rat. The public index contains 22 documents. Reported test dates in this set run from Jul 14, 2026 through Jul 14, 2026. That coverage figure counts the full tracked catalogue for Zesty Rat, including products that are currently out of stock, so it can differ from the in-stock figure above.
- Product coverage
- 17 of 27
- Tested in past year
- 17 of 17
- Older records
- 0
- Most named lab
- Janoshik Analytical
63% · tracked-vendor median 54%
Based on the printed test date.
Printed date is over 18 months old.
100% of current records that name a lab.
17 current records
- Reported purity
- 99.16%99.0–99.49%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.78%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 97.97%Under 99%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.1%99.0–99.49%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.02%99.0–99.49%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 98.292%Under 99%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 96.677%Under 99%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.61%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.82%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.72%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.73%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.78%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 96.28%Under 99%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.705%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 97.706%Under 99%
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
- Reported purity
- 99.84%99.5%+
- Test date
- Jul 14, 2026
- Laboratory named
- Janoshik Analytical
Lot not reportedView COA
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 numbers measure document coverage only. 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.