Vendor comparison
Catalyst Peptides vs Peptide Science Store
Catalyst Peptides is cheaper per mg on 26 of the 37 peptides they share; Peptide Science Store on 8, the same price on 3.
Across all 37, Catalyst Peptides’s price per mg is a median 24% lower than Peptide Science Store’s.
- Listings on the index
- 55
- Cheaper per mg on
- 26 of 37 shared
- Certificates of analysis on file
- none yet
- Ships from
- not stated
- Latest price check
- 21 Oct 2026
- Listings on the index
- 66
- Cheaper per mg on
- 8 of 37 shared
- Certificates of analysis on file
- none yet
- Ships from
- not stated
- Latest price check
- 5 Nov 2026
Retail 37
Purchases of fewer than 10 vials.
- AICAR
Catalyst Peptides
$1.12/mg
50 mg · $56.00
checked 21 Oct 2026
Peptide Science Store
$1.30/mg
50 mg · $65.00
checked 5 Nov 2026
Catalyst Peptides 14% cheaper
- AOD-9604
Catalyst Peptides
$9.60/mg
10 mg · $96.00
checked 21 Oct 2026
Peptide Science Store
$10.83/mg
6 mg · $65.00
checked 5 Nov 2026
Catalyst Peptides 11% cheaper
- ARA-290
Catalyst Peptides
$5.90/mg
10 mg · $59.00
checked 21 Oct 2026
Peptide Science Store
$5.94/mg
16 mg · $95.00
checked 5 Nov 2026
Catalyst Peptides 1% cheaper
- BPC-157
Catalyst Peptides
$5.40/mg
10 mg · $54.00
checked 21 Oct 2026
Peptide Science Store
$9.33/mg
15 mg · $140.00
checked 5 Nov 2026
Catalyst Peptides 42% cheaper
- DSIP
Catalyst Peptides
$5.20/mg
10 mg · $52.00
checked 21 Oct 2026
Peptide Science Store
$10.00/mg
5 mg · $50.00
checked 5 Nov 2026
Catalyst Peptides 48% cheaper
- Epithalon
Catalyst Peptides
$3.15/mg
10 mg · $31.50
checked 21 Oct 2026
Peptide Science Store
$4.30/mg
50 mg · $215.00
checked 5 Nov 2026
Catalyst Peptides 27% cheaper
- FOXO4-DRI
Catalyst Peptides
$31.50/mg
10 mg · $315.00
checked 21 Oct 2026
Peptide Science Store
$30.00/mg
10 mg · $300.00
checked 5 Nov 2026
Peptide Science Store 5% cheaper
- GHK-Cu
Catalyst Peptides
$0.700/mg
100 mg · $70.00
checked 21 Oct 2026
Peptide Science Store
$1.40/mg
50 mg · $70.00
checked 5 Nov 2026
Catalyst Peptides 50% cheaper
- GHRP-2
Catalyst Peptides
$5.00/mg
10 mg · $50.00
checked 21 Oct 2026
Peptide Science Store
$5.00/mg
10 mg · $50.00
checked 5 Nov 2026
Same price
- GHRP-6
Catalyst Peptides
$5.00/mg
10 mg · $50.00
checked 21 Oct 2026
Peptide Science Store
$5.00/mg
10 mg · $50.00
checked 5 Nov 2026
Same price
- Glutathione
Catalyst Peptides
$0.051/mg
1500 mg · $77.00
checked 21 Oct 2026
Peptide Science Store
$0.142/mg
600 mg · $85.00
checked 5 Nov 2026
Catalyst Peptides 64% cheaper
- Hexarelin
Catalyst Peptides
$13.00/mg
5 mg · $65.00
checked 21 Oct 2026
Peptide Science Store
$9.00/mg
5 mg · $45.00
checked 5 Nov 2026
Peptide Science Store 31% cheaper
- IGF-1 LR3
Catalyst Peptides
$75.00/mg
1 mg · $75.00
checked 21 Oct 2026
Peptide Science Store
$110.00/mg
1 mg · $110.00
checked 5 Nov 2026
Catalyst Peptides 32% cheaper
- Ipamorelin
Catalyst Peptides
$5.60/mg
10 mg · $56.00
checked 21 Oct 2026
Peptide Science Store
$8.00/mg
10 mg · $80.00
checked 5 Nov 2026
Catalyst Peptides 30% cheaper
- Kisspeptin
Catalyst Peptides
$5.25/mg
10 mg · $52.50
checked 21 Oct 2026
Peptide Science Store
$13.00/mg
5 mg · $65.00
checked 5 Nov 2026
Catalyst Peptides 60% cheaper
- KPV
Catalyst Peptides
$4.50/mg
10 mg · $45.00
checked 21 Oct 2026
Peptide Science Store
$11.00/mg
5 mg · $55.00
checked 5 Nov 2026
Catalyst Peptides 59% cheaper
- LL-37
Catalyst Peptides
$11.40/mg
5 mg · $57.00
checked 21 Oct 2026
Peptide Science Store
$19.00/mg
5 mg · $95.00
checked 5 Nov 2026
Catalyst Peptides 40% cheaper
- Melanotan 1
Catalyst Peptides
$4.50/mg
10 mg · $45.00
checked 21 Oct 2026
Peptide Science Store
$5.50/mg
10 mg · $55.00
checked 5 Nov 2026
Catalyst Peptides 18% cheaper
- MGF
Catalyst Peptides
$25.00/mg
2 mg · $50.00
checked 21 Oct 2026
Peptide Science Store
$30.00/mg
5 mg · $150.00
checked 5 Nov 2026
Catalyst Peptides 17% cheaper
- MOTS-C
Catalyst Peptides
$4.20/mg
10 mg · $42.00
checked 21 Oct 2026
Peptide Science Store
$11.00/mg
10 mg · $110.00
checked 5 Nov 2026
Catalyst Peptides 62% cheaper
- NAD+
Catalyst Peptides
$0.087/mg
1000 mg · $87.50
checked 21 Oct 2026
Peptide Science Store
$0.400/mg
750 mg · $300.00
checked 5 Nov 2026
Catalyst Peptides 78% cheaper
- Oxytocin
Catalyst Peptides
$4.50/mg
10 mg · $45.00
checked 21 Oct 2026
Peptide Science Store
$6.50/mg
10 mg · $65.00
checked 5 Nov 2026
Catalyst Peptides 31% cheaper
- P21
Catalyst Peptides
$29.90/mg
10 mg · $299.00
checked 21 Oct 2026
Peptide Science Store
$24.00/mg
5 mg · $120.00
checked 5 Nov 2026
Peptide Science Store 20% cheaper
- PE-22-28
Catalyst Peptides
$5.00/mg
10 mg · $50.00
checked 21 Oct 2026
Peptide Science Store
$7.50/mg
8 mg · $60.00
checked 5 Nov 2026
Catalyst Peptides 33% cheaper
- PEG-MGF
Catalyst Peptides
$24.00/mg
2 mg · $48.00
checked 21 Oct 2026
Peptide Science Store
$19.00/mg
5 mg · $95.00
checked 5 Nov 2026
Peptide Science Store 21% cheaper
- Pinealon
Catalyst Peptides
$6.50/mg
10 mg · $65.00
checked 21 Oct 2026
Peptide Science Store
$3.75/mg
20 mg · $75.00
checked 5 Nov 2026
Peptide Science Store 42% cheaper
- PNC-27
Catalyst Peptides
$7.20/mg
10 mg · $72.00
checked 21 Oct 2026
Peptide Science Store
$30.00/mg
5 mg · $150.00
checked 5 Nov 2026
Catalyst Peptides 76% cheaper
- Selank
Catalyst Peptides
$4.20/mg
10 mg · $42.00
checked 21 Oct 2026
Peptide Science Store
$5.50/mg
10 mg · $55.00
checked 5 Nov 2026
Catalyst Peptides 24% cheaper
- Semax
Catalyst Peptides
$4.20/mg
10 mg · $42.00
checked 21 Oct 2026
Peptide Science Store
$2.50/mg
30 mg · $75.00
checked 5 Nov 2026
Peptide Science Store 40% cheaper
- Sermorelin
Catalyst Peptides
$8.40/mg
10 mg · $84.00
checked 21 Oct 2026
Peptide Science Store
$8.33/mg
15 mg · $125.00
checked 5 Nov 2026
Peptide Science Store 1% cheaper
- TB-500
Catalyst Peptides
$6.50/mg
10 mg · $65.00
checked 21 Oct 2026
Peptide Science Store
$16.50/mg
10 mg · $165.00
checked 5 Nov 2026
Catalyst Peptides 61% cheaper
- Tesamorelin
Catalyst Peptides
$10.00/mg
10 mg · $100.00
checked 21 Oct 2026
Peptide Science Store
$15.00/mg
5 mg · $75.00
checked 5 Nov 2026
Catalyst Peptides 33% cheaper
- Testagen
Catalyst Peptides
$3.85/mg
20 mg · $77.00
checked 21 Oct 2026
Peptide Science Store
$3.25/mg
20 mg · $65.00
checked 5 Nov 2026
Peptide Science Store 16% cheaper
- Thymalin
Catalyst Peptides
$6.00/mg
10 mg · $60.00
checked 21 Oct 2026
Peptide Science Store
$6.00/mg
20 mg · $120.00
checked 5 Nov 2026
Same price
- Thymosin Alpha-1
Catalyst Peptides
$7.80/mg
10 mg · $78.00
checked 21 Oct 2026
Peptide Science Store
$13.00/mg
10 mg · $130.00
checked 5 Nov 2026
Catalyst Peptides 40% cheaper
- Vilon
Catalyst Peptides
$3.00/mg
20 mg · $60.00
checked 21 Oct 2026
Peptide Science Store
$3.25/mg
20 mg · $65.00
checked 5 Nov 2026
Catalyst Peptides 8% cheaper
- VIP
Catalyst Peptides
$12.00/mg
10 mg · $120.00
checked 21 Oct 2026
Peptide Science Store
$12.50/mg
6 mg · $75.00
checked 5 Nov 2026
Catalyst Peptides 4% cheaper
| Peptide | Catalyst Peptides | Peptide Science Store | Difference per mg |
|---|---|---|---|
| AICAR | $1.12/mg 50 mg · $56.00 checked 21 Oct 2026 | $1.30/mg 50 mg · $65.00 checked 5 Nov 2026 | Catalyst Peptides 14% cheaper |
| AOD-9604 | $9.60/mg 10 mg · $96.00 checked 21 Oct 2026 | $10.83/mg 6 mg · $65.00 checked 5 Nov 2026 | Catalyst Peptides 11% cheaper |
| ARA-290 | $5.90/mg 10 mg · $59.00 checked 21 Oct 2026 | $5.94/mg 16 mg · $95.00 checked 5 Nov 2026 | Catalyst Peptides 1% cheaper |
| BPC-157 | $5.40/mg 10 mg · $54.00 checked 21 Oct 2026 | $9.33/mg 15 mg · $140.00 checked 5 Nov 2026 | Catalyst Peptides 42% cheaper |
| DSIP | $5.20/mg 10 mg · $52.00 checked 21 Oct 2026 | $10.00/mg 5 mg · $50.00 checked 5 Nov 2026 | Catalyst Peptides 48% cheaper |
| Epithalon | $3.15/mg 10 mg · $31.50 checked 21 Oct 2026 | $4.30/mg 50 mg · $215.00 checked 5 Nov 2026 | Catalyst Peptides 27% cheaper |
| FOXO4-DRI | $31.50/mg 10 mg · $315.00 checked 21 Oct 2026 | $30.00/mg 10 mg · $300.00 checked 5 Nov 2026 | Peptide Science Store 5% cheaper |
| GHK-Cu | $0.700/mg 100 mg · $70.00 checked 21 Oct 2026 | $1.40/mg 50 mg · $70.00 checked 5 Nov 2026 | Catalyst Peptides 50% cheaper |
| GHRP-2 | $5.00/mg 10 mg · $50.00 checked 21 Oct 2026 | $5.00/mg 10 mg · $50.00 checked 5 Nov 2026 | Same price |
| GHRP-6 | $5.00/mg 10 mg · $50.00 checked 21 Oct 2026 | $5.00/mg 10 mg · $50.00 checked 5 Nov 2026 | Same price |
| Glutathione | $0.051/mg 1500 mg · $77.00 checked 21 Oct 2026 | $0.142/mg 600 mg · $85.00 checked 5 Nov 2026 | Catalyst Peptides 64% cheaper |
| Hexarelin | $13.00/mg 5 mg · $65.00 checked 21 Oct 2026 | $9.00/mg 5 mg · $45.00 checked 5 Nov 2026 | Peptide Science Store 31% cheaper |
| IGF-1 LR3 | $75.00/mg 1 mg · $75.00 checked 21 Oct 2026 | $110.00/mg 1 mg · $110.00 checked 5 Nov 2026 | Catalyst Peptides 32% cheaper |
| Ipamorelin | $5.60/mg 10 mg · $56.00 checked 21 Oct 2026 | $8.00/mg 10 mg · $80.00 checked 5 Nov 2026 | Catalyst Peptides 30% cheaper |
| Kisspeptin | $5.25/mg 10 mg · $52.50 checked 21 Oct 2026 | $13.00/mg 5 mg · $65.00 checked 5 Nov 2026 | Catalyst Peptides 60% cheaper |
| KPV | $4.50/mg 10 mg · $45.00 checked 21 Oct 2026 | $11.00/mg 5 mg · $55.00 checked 5 Nov 2026 | Catalyst Peptides 59% cheaper |
| LL-37 | $11.40/mg 5 mg · $57.00 checked 21 Oct 2026 | $19.00/mg 5 mg · $95.00 checked 5 Nov 2026 | Catalyst Peptides 40% cheaper |
| Melanotan 1 | $4.50/mg 10 mg · $45.00 checked 21 Oct 2026 | $5.50/mg 10 mg · $55.00 checked 5 Nov 2026 | Catalyst Peptides 18% cheaper |
| MGF | $25.00/mg 2 mg · $50.00 checked 21 Oct 2026 | $30.00/mg 5 mg · $150.00 checked 5 Nov 2026 | Catalyst Peptides 17% cheaper |
| MOTS-C | $4.20/mg 10 mg · $42.00 checked 21 Oct 2026 | $11.00/mg 10 mg · $110.00 checked 5 Nov 2026 | Catalyst Peptides 62% cheaper |
| NAD+ | $0.087/mg 1000 mg · $87.50 checked 21 Oct 2026 | $0.400/mg 750 mg · $300.00 checked 5 Nov 2026 | Catalyst Peptides 78% cheaper |
| Oxytocin | $4.50/mg 10 mg · $45.00 checked 21 Oct 2026 | $6.50/mg 10 mg · $65.00 checked 5 Nov 2026 | Catalyst Peptides 31% cheaper |
| P21 | $29.90/mg 10 mg · $299.00 checked 21 Oct 2026 | $24.00/mg 5 mg · $120.00 checked 5 Nov 2026 | Peptide Science Store 20% cheaper |
| PE-22-28 | $5.00/mg 10 mg · $50.00 checked 21 Oct 2026 | $7.50/mg 8 mg · $60.00 checked 5 Nov 2026 | Catalyst Peptides 33% cheaper |
| PEG-MGF | $24.00/mg 2 mg · $48.00 checked 21 Oct 2026 | $19.00/mg 5 mg · $95.00 checked 5 Nov 2026 | Peptide Science Store 21% cheaper |
| Pinealon | $6.50/mg 10 mg · $65.00 checked 21 Oct 2026 | $3.75/mg 20 mg · $75.00 checked 5 Nov 2026 | Peptide Science Store 42% cheaper |
| PNC-27 | $7.20/mg 10 mg · $72.00 checked 21 Oct 2026 | $30.00/mg 5 mg · $150.00 checked 5 Nov 2026 | Catalyst Peptides 76% cheaper |
| Selank | $4.20/mg 10 mg · $42.00 checked 21 Oct 2026 | $5.50/mg 10 mg · $55.00 checked 5 Nov 2026 | Catalyst Peptides 24% cheaper |
| Semax | $4.20/mg 10 mg · $42.00 checked 21 Oct 2026 | $2.50/mg 30 mg · $75.00 checked 5 Nov 2026 | Peptide Science Store 40% cheaper |
| Sermorelin | $8.40/mg 10 mg · $84.00 checked 21 Oct 2026 | $8.33/mg 15 mg · $125.00 checked 5 Nov 2026 | Peptide Science Store 1% cheaper |
| TB-500 | $6.50/mg 10 mg · $65.00 checked 21 Oct 2026 | $16.50/mg 10 mg · $165.00 checked 5 Nov 2026 | Catalyst Peptides 61% cheaper |
| Tesamorelin | $10.00/mg 10 mg · $100.00 checked 21 Oct 2026 | $15.00/mg 5 mg · $75.00 checked 5 Nov 2026 | Catalyst Peptides 33% cheaper |
| Testagen | $3.85/mg 20 mg · $77.00 checked 21 Oct 2026 | $3.25/mg 20 mg · $65.00 checked 5 Nov 2026 | Peptide Science Store 16% cheaper |
| Thymalin | $6.00/mg 10 mg · $60.00 checked 21 Oct 2026 | $6.00/mg 20 mg · $120.00 checked 5 Nov 2026 | Same price |
| Thymosin Alpha-1 | $7.80/mg 10 mg · $78.00 checked 21 Oct 2026 | $13.00/mg 10 mg · $130.00 checked 5 Nov 2026 | Catalyst Peptides 40% cheaper |
| Vilon | $3.00/mg 20 mg · $60.00 checked 21 Oct 2026 | $3.25/mg 20 mg · $65.00 checked 5 Nov 2026 | Catalyst Peptides 8% cheaper |
| VIP | $12.00/mg 10 mg · $120.00 checked 21 Oct 2026 | $12.50/mg 6 mg · $75.00 checked 5 Nov 2026 | Catalyst Peptides 4% cheaper |
Only at Catalyst Peptides: 18 peptides in the same market
Only at Peptide Science Store: 29 peptides in the same market
- Adipotide
- B7-33
- Bronchogen
- Cardiogen
- Cartalax
- Chonluten
- CJC-1295 NO DAC
- Cortagen
- Follistatin-315
- Follistatin-344
- GHK Basic
- GHRH
- Gonadorelin
- hGH Fragment 176-191
- Humanin
- Livagen
- N-Acetyl Epithalon Amidate
- N-Acetyl Selank Amidate
- N-Acetyl Semax Amidate
- Ovagen
- Pancragen
- Prostamax
- TB-500 Fragment
- Thymogen
- Triptorelin
- Vesilute
- Vesugen
- Melanotan 2(Bulk)
- PT-141(Bulk)
Catalyst Peptides compared with
- Lab Ratz Research51 shared
- NHOV49 shared
- Peptides direct to you49 shared
- Peptides GG48 shared
- Huaian Hanyou Peptide47 shared
- Research1peptides47 shared
- LabFirst Peptides46 shared
- Alpha Peptides45 shared
- Ares Research45 shared
- Vipris Biotechnology45 shared
- Nexus Bio Life44 shared
- VPeptide43 shared
- Bridge Research42 shared
- Luxe Peptides42 shared
- Pure Lab Peptides42 shared
- Eppixlabs41 shared
- Grey Axis Research41 shared
- Raw Amino41 shared
- Biotech Peptides40 shared
- Core Peptides40 shared
- Peptide Science Now40 shared
- Prime Longevity Peptides40 shared
- Amino Usa39 shared
- Cenexa Labs39 shared
- Priority Peptides39 shared
- Eros Peptides38 shared
- Grey Matters Research38 shared
- SQS Research37 shared
- TrueLab Peptides37 shared
- Nordsci Peptides36 shared
Peptide Science Store compared with
- Peptide Science Now63 shared
- Nordsci Peptides59 shared
- Huaian Hanyou Peptide58 shared
- Core Peptides55 shared
- Peptides direct to you55 shared
- Raw Amino55 shared
- Peptides GG54 shared
- Luxe Peptides53 shared
- Lab Ratz Research51 shared
- Amino Usa50 shared
- NHOV48 shared
- Prime Longevity Peptides48 shared
- Vipris Biotechnology48 shared
- VPeptide47 shared
- Cenexa Labs45 shared
- Nexus Bio Life45 shared
- Research1peptides45 shared
- Biotech Peptides44 shared
- TrueLab Peptides44 shared
- Priority Peptides43 shared
- Eros Peptides42 shared
- Grey Matters Research41 shared
- Grey Axis Research39 shared
- LabFirst Peptides39 shared
- Pure Lab Peptides39 shared
- Eppixlabs38 shared
- Alpha Peptides35 shared
- Ares Research35 shared
- Bridge Research35 shared
- SQS Research31 shared
Two listings are compared only when they are the same peptide in the same market, so a 10-vial kit is never set against a single vial. Price per mg is our arithmetic on the listed price, for comparison; the amount you pay is the listed price for the size shown, so check it on the vendor’s own page before you buy. What price per mg means.
No vendor can pay to change a price or the order of anything on this page. Some outbound links are affiliate links.