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Coastal Peptides vs Oupeptide
Head-to-head on 7 shared peptides: Coastal Peptides is cheaper on 0, Oupeptide on 7. Average price gap 74% — compared Oct 19, 2026.
- Catalog
- 15 peptides
- In stock (shared)
- 7
- Last checked
- Sep 28, 2026(stale · 28d old)
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- Catalog
- 7 peptides
- In stock (shared)
- 7
- Last checked
- Oct 19, 2026(stale · 7d old)
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 — 7 shared peptides
Prices last checked Oct 19, 2026| Peptide | Coastal Peptides | Oupeptide | Δ $/mg |
|---|---|---|---|
| BPC-157 | $4.40/mg 10mg · $44.00 | $1.30/mgcheaper 100mg · $130.00 | 70% |
| KLOW | $1.49/mg 80mg · $119.00 | $0.42/mgcheaper 800mg · $340.00 | 71% |
| Retatrutide | $5.97/mg 30mg · $179.00 | $1.27/mgcheaper 300mg · $380.00 | 79% |
| Semaglutide | $7.90/mg 10mg · $79.00 | $0.63/mgcheaper 300mg · $190.00 | 92% |
| TB-500 | $6.40/mg 10mg · $64.00 | $2.55/mgcheaper 100mg · $255.00 | 60% |
| Tesamorelin | $6.50/mg 10mg · $65.00 | $2.60/mgcheaper 200mg · $520.00 | 60% |
| Tirzepatide | $3.98/mg 60mg · $239.00 | $0.57/mgcheaper 600mg · $340.00 | 86% |
Best available size tier per vendor, normalized to $/mg; in-stock tiers preferred. How prices are collected →
Third-party purity data
On file: Coastal Peptides — 9 results (Finnrick ×5 · Peptigrity ×4) · Oupeptide — 9 results (Finnrick ×9).
Common questions
Is Coastal Peptides or Oupeptide cheaper?
Across 7 peptides both vendors sell, Coastal Peptides has the lower $/mg price on 0 and Oupeptide on 7. The average per-peptide price gap is 74%. The table above compares each vendor's best size tier on a $/mg basis.
Do Coastal Peptides and Oupeptide have third-party lab tests?
Coastal Peptides has 9 third-party results on file (Finnrick ×5 · Peptigrity ×4); Oupeptide has 9 (Finnrick ×9). Independent labs test samples bought from vendors and publish HPLC purity — grade A (≥98%) is the research-use baseline.
How many peptides do Coastal Peptides and Oupeptide both sell?
Both vendors list 7 of the same peptides, including BPC-157, KLOW, Retatrutide, Semaglutide, TB-500 and 2 more. Coastal Peptides tracks 15 peptides total on PepVendors; Oupeptide tracks 7.