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Peptides 4 Research vs SaiyanMed
Head-to-head on 19 shared peptides: Peptides 4 Research is cheaper on 0, SaiyanMed on 19. Average price gap 82% — compared Oct 26, 2026.
- Catalog
- 19 peptides
- In stock (shared)
- 19
- Last checked
- Mar 20, 2026(stale · 220d old)
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- Catalog
- 26 peptides
- In stock (shared)
- 19
- Last checked
- Oct 26, 2026(updated today)
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Price comparison — 19 shared peptides
Prices last checked Oct 26, 2026| Peptide | Peptides 4 Research | SaiyanMed | Δ $/mg |
|---|---|---|---|
| BPC-157 | $7.50/mg 10mg · $75.00 | $0.65/mgcheaper 100mg · $65.00 | 91% |
| CJC-1295 | $8.00/mg 5mg · $40.00 | $1.40/mgcheaper 100mg · $140.00 | 83% |
| DSIP | $4.50/mg 10mg · $45.00 | $0.97/mgcheaper 100mg · $97.00 | 78% |
| GHK-Cu | $0.90/mg 50mg · $45.00 | $0.06/mgcheaper 1000mg · $58.00 | 94% |
| GHRP-2 | $5.80/mg 5mg · $29.00 | $0.50/mgcheaper 100mg · $50.00 | 91% |
| GHRP-6 | $5.40/mg 5mg · $27.00 | $0.50/mgcheaper 100mg · $50.00 | 91% |
| IGF-1 LR3 | $85.00/mg 1mg · $85.00 | $27.20/mgcheaper 10mg · $272.00 | 68% |
| Ipamorelin | $7.00/mg 5mg · $35.00 | $0.65/mgcheaper 100mg · $65.00 | 91% |
| KLOW | $2.40/mg 50mg · $120.00 | $0.32/mgcheaper 800mg · $254.00 | 87% |
| Melanotan I | $3.50/mg 10mg · $35.00 | $0.68/mgcheaper 100mg · $68.00 | 81% |
| Melanotan II | $2.90/mg 10mg · $29.00 | $0.68/mgcheaper 100mg · $68.00 | 77% |
| MOTS-c | $4.20/mg 10mg · $42.00 | $0.61/mgcheaper 400mg · $244.00 | 85% |
| PT-141 | $3.70/mg 10mg · $37.00 | $0.70/mgcheaper 100mg · $70.00 | 81% |
| Retatrutide | $14.30/mg 10mg · $143.00 | $0.72/mgcheaper 500mg · $360.00 | 95% |
| Selank | $3.50/mg 10mg · $35.00 | $0.80/mgcheaper 100mg · $80.00 | 77% |
| Semax | $3.50/mg 10mg · $35.00 | $0.80/mgcheaper 100mg · $80.00 | 77% |
| Sermorelin | $6.40/mg 10mg · $64.00 | $1.90/mgcheaper 100mg · $190.00 | 70% |
| TB-500 | $6.50/mg 10mg · $65.00 | $1.84/mgcheaper 100mg · $184.00 | 72% |
| Tesamorelin | $6.10/mg 10mg · $61.00 | $2.19/mgcheaper 100mg · $219.00 | 64% |
Best available size tier per vendor, normalized to $/mg; in-stock tiers preferred. How prices are collected →
Third-party purity data
On file: Peptides 4 Research — 5 results (Finnrick ×5) · SaiyanMed — 12 results (Peptigrity ×8 · Finnrick ×4).
Common questions
Is Peptides 4 Research or SaiyanMed cheaper?
Across 19 peptides both vendors sell, Peptides 4 Research has the lower $/mg price on 0 and SaiyanMed on 19. The average per-peptide price gap is 82%. The table above compares each vendor's best size tier on a $/mg basis.
Do Peptides 4 Research and SaiyanMed have third-party lab tests?
Peptides 4 Research has 5 third-party results on file (Finnrick ×5); SaiyanMed has 12 (Peptigrity ×8 · Finnrick ×4). Independent labs test samples bought from vendors and publish HPLC purity — grade A (≥98%) is the research-use baseline.
How many peptides do Peptides 4 Research and SaiyanMed both sell?
Both vendors list 19 of the same peptides, including BPC-157, CJC-1295, DSIP, GHK-Cu, GHRP-2 and 14 more. Peptides 4 Research tracks 19 peptides total on PepVendors; SaiyanMed tracks 26.