Nationwide Peptides vs Peptide Works
Across the 36 products both vendors stock, Nationwide Peptides has the lower effective price per mg on 18 and Peptide Works on 17, and 1 prices the same to the cent. Nationwide Peptides lists 108 tracked listings across 47 products; Peptide Works lists 87 across 51. On certificates of analysis the in-stock products we track rate partial at Nationwide Peptides and broad at Peptide Works. 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.
Nationwide Peptides is a US research-peptide vendor based in Sevierville, TN that lists 106 injectable peptides.
- Price vs market median
- 3% above market
- Tracked catalog
- 47 products · $$
- Cheaper on
- 18 of 36 shared
- COA coverage
- Partial
Peptide Works is a research-peptide vendor that lists 85 injectable peptides, including Selank, PT-141 and Melanotan II.
- Price vs market median
- 14% below market
- Tracked catalog
- 51 products · $
- Cheaper on
- 17 of 36 shared
- COA coverage
- Broad
Vendor facts
Dashes mark facts we have not recorded yet. Vendor-stated details come from each storefront and can change without notice. Facts for Nationwide Peptides and Peptide Works were extracted from the vendor's site and not yet reviewed by us.
Certificates on file
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.
Carried by one vendor only
Only at Nationwide Peptides
11 products the other vendor does not list
- Retatrutide$3.44
- Tirzepatide$2.48
- Cagrilintide$12.40
- Cardiogen$4.95
- Cerebrolysin$1.65
- L-Carnitine$0.08
- Mazdutide$15
- P21$19.40
Only at Peptide Works
15 products the other vendor does not list
- DSIP$6.36
- B7-33$9.72
- Bronchogen$2.51
- Cartalax$2.51
- Follistatin$107.43
- GDF-8 (Myostatin)$106.82
- MGF$10.63
- MK-677$5.23
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is Nationwide Peptides cheaper than Peptide Works?
- On the 36 products both vendors stock, Nationwide Peptides has the lower effective price per mg on 18 and Peptide Works on 17, with 1 priced the same to the cent. Each side uses the cheapest in-stock listing we track for that product, after any public discount code, and prices change often.
- How much COA coverage does each vendor have?
- Nationwide Peptides: partial, newest test dated 2026-08-21. Peptide Works: broad, newest test dated 2025-09-21. 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.
- How do shipping and payment differ between Nationwide Peptides and Peptide Works?
- Nationwide Peptides: ships from US-registered facilities, 4-7 days in transit, accepts card. Peptide Works: accepts card, zelle, wire, crypto. Details come from each vendor's own site and can change without notice; check the storefront before ordering.