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Peptide Partners vs Reta-Peptide
Head-to-head on 18 shared peptides: Peptide Partners is cheaper on 3, Reta-Peptide on 15. Average price gap 64% — compared Oct 26, 2026.
- Catalog
- 21 peptides
- In stock (shared)
- 16
- Last checked
- Oct 22, 2026(updated 4d ago)
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- Catalog
- 18 peptides
- In stock (shared)
- 18
- Last checked
- Oct 26, 2026(updated today)
Some outbound links are affiliate links — we may earn a commission on purchases made through them. It never affects rankings, prices, or purity data. How we make money
Price comparison — 18 shared peptides
Prices last checked Oct 26, 2026| Peptide | Peptide Partners | Reta-Peptide | Δ $/mg |
|---|---|---|---|
| AOD-9604 | $5.20/mg 100mg · $520.00 | $1.80/mgcheaper 50mg · $90.00 | 65% |
| BPC-157 | $1.00/mg 800mg · $800.00 | $0.65/mgcheaper 100mg · $65.00 | 35% |
| CJC-1295 | $4.44/mg 200mg · $888.00 | $2.90/mgcheaper 50mg · $145.00 | 35% |
| Epithalon | $1.98/mg 400mg · $792.00 | $0.99/mgcheaper 100mg · $99.00 | 50% |
| GHK-Cu | $0.45/mg 2000mg · $900.00(out of stock) | $0.06/mgcheaper 1000mg · $58.00 | 87% |
| GLOW | $0.88/mgcheaper 700mg · $616.00 | $3.64/mg 70mg · $255.00 | 76% |
| Ipamorelin | $2.88/mg 200mg · $577.00 | $0.75/mgcheaper 100mg · $75.00 | 74% |
| Kisspeptin-10 | $3.83/mg 200mg · $765.00 | $1.00/mgcheaper 100mg · $100.00 | 74% |
| MOTS-c | $2.00/mgcheaper 400mg · $800.00 | $6.50/mg 10mg · $65.00 | 69% |
| PT-141 | $3.20/mg 100mg · $320.00 | $0.85/mgcheaper 100mg · $85.00 | 73% |
| Retatrutide | $3.15/mg 480mg · $1512.00 | $1.35/mgcheaper 100mg · $135.00 | 57% |
| Semaglutide | $4.88/mg 200mg · $976.00 | $0.65/mgcheaper 100mg · $65.00 | 87% |
| Semax | $1.03/mgcheaper 300mg · $310.50 | $1.90/mg 50mg · $95.00 | 46% |
| Sermorelin | $3.98/mg 200mg · $797.00 | $1.35/mgcheaper 100mg · $135.00 | 66% |
| TB-500 | $4.90/mg 100mg · $490.00 | $1.20/mgcheaper 100mg · $120.00 | 76% |
| Tesamorelin | $4.49/mg 200mg · $898.00 | $1.80/mgcheaper 100mg · $180.00 | 60% |
| Thymosin Alpha-1 | $3.70/mg 100mg · $370.00(out of stock) | $1.75/mgcheaper 100mg · $175.00 | 53% |
| Tirzepatide | $1.50/mg 1200mg · $1800.00 | $0.48/mgcheaper 300mg · $145.00 | 68% |
Best available size tier per vendor, normalized to $/mg; in-stock tiers preferred. How prices are collected →
Third-party purity data
On file: Peptide Partners — 19 results (Peptigrity ×10 · Finnrick ×8 · Disclosed Labs ×1) · Reta-Peptide — 13 results (Finnrick ×11 · Janoshik ×2).
Common questions
Is Peptide Partners or Reta-Peptide cheaper?
Across 18 peptides both vendors sell, Peptide Partners has the lower $/mg price on 3 and Reta-Peptide on 15. The average per-peptide price gap is 64%. The table above compares each vendor's best size tier on a $/mg basis.
Do Peptide Partners and Reta-Peptide have third-party lab tests?
Peptide Partners has 19 third-party results on file (Peptigrity ×10 · Finnrick ×8 · Disclosed Labs ×1); Reta-Peptide has 13 (Finnrick ×11 · Janoshik ×2). Independent labs test samples bought from vendors and publish HPLC purity — grade A (≥98%) is the research-use baseline.
How many peptides do Peptide Partners and Reta-Peptide both sell?
Both vendors list 18 of the same peptides, including AOD-9604, BPC-157, CJC-1295, Epithalon, GHK-Cu and 13 more. Peptide Partners tracks 21 peptides total on PepVendors; Reta-Peptide tracks 18.