Vendors

Improved Peptides vs OPS Peptide Science

Improved Peptides and OPS Peptide Science have no priced products in common in the current index. Improved Peptides lists 20 tracked listings across 0 products; OPS Peptide Science lists 89 across 45. On certificates of analysis the in-stock products we track rate not assessed at Improved Peptides and none found at OPS Peptide Science. Based on the certificates our crawler found; vendors may publish more than we index. These are price and document observations, not quality ratings, and neither vendor is endorsed.

We hold limited price data for Improved Peptides, so parts of this comparison are thinner than usual.

Improved Peptides

Improved Peptides is a research-peptide vendor.

Price vs market median
Not enough matched rows
Tracked catalog
0 products
COA coverage
Not assessed
Visit Improved Peptides
OPS Peptide Science

OPS Peptide Science is a research-peptide vendor that lists 88 injectable peptides, including GHK-Cu, Tirzepatide and Retatrutide.

Price vs market median
59% above market
Tracked catalog
45 products · $$$
COA coverage
None found
Visit OPS Peptide Science

Vendor facts

Detail
Improved Peptides
OPS Peptide Science
Sells
—
88 vials
Tracked listings
20 across 0 products
89 across 45 products

Dashes mark facts we have not recorded yet. Vendor-stated details come from each storefront and can change without notice.

Certificates on file

Detail
Improved Peptides
OPS Peptide Science
COA coverage
Not assessed
None found
Certificates
0 current
0 current
Labs
—
—
Newest test date
—
—

Coverage rates how many of the in-stock products we track have a certificate our pipeline read and matched to a catalog peptide. Based on the certificates our crawler found; vendors may publish more than we index. We do not test products, and a certificate cannot show authenticity, chain of custody or sterility.

Shared catalog

Improved Peptides and OPS Peptide Science have no priced products in common in the current index, so there is nothing to compare price for price.

Carried by one vendor only

Only at OPS Peptide Science

45 products the other vendor does not list

37 more on the OPS Peptide Science page

Prices shown are per mg for the cheapest in-stock listing we track.

Questions

How much COA coverage does each vendor have?
Improved Peptides: not assessed. OPS Peptide Science: none found. Based on the certificates our crawler found; vendors may publish more than we index. We do not test products ourselves, and a certificate cannot prove authenticity or sterility.
What does each vendor carry?
Improved Peptides has 0 priced products in the current index and OPS Peptide Science has 45, with no overlap. 0 products are listed only by Improved Peptides and 45 only by OPS Peptide Science.

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Market tape