Vendor comparison
Grey Matters Research vs Peptide Science Now
Grey Matters Research is cheaper per mg on 41 of the 41 peptides they share.
Across all 41, Grey Matters Research’s price per mg is a median 73% lower than Peptide Science Now’s.
- Listings on the index
- 56
- Cheaper per mg on
- 41 of 41 shared
- Certificates of analysis on file
- none yet
- Ships from
- United States
- Latest price check
- 18 Aug 2026
- Listings on the index
- 69
- Cheaper per mg on
- 0 of 41 shared
- Certificates of analysis on file
- none yet
- Ships from
- United States
- Latest price check
- 30 Oct 2026
Retail 41
Purchases of fewer than 10 vials.
- Adipotide
Grey Matters Research
$3.10/mg
10 mg · $31.00
checked 18 Aug 2026
Peptide Science Now
$8.90/mg
10 mg · $89.00
checked 30 Oct 2026
Grey Matters Research 65% cheaper
- AICAR
Grey Matters Research
$0.300/mg
50 mg · $15.00
checked 18 Aug 2026
Peptide Science Now
$1.00/mg
50 mg · $50.00
checked 30 Oct 2026
Grey Matters Research 70% cheaper
- AOD-9604
Grey Matters Research
$4.00/mg
5 mg · $20.00
checked 18 Aug 2026
Peptide Science Now
$10.83/mg
6 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 63% cheaper
- ARA-290
Grey Matters Research
$1.19/mg
16 mg · $19.00
checked 18 Aug 2026
Peptide Science Now
$4.69/mg
16 mg · $75.00
checked 30 Oct 2026
Grey Matters Research 75% cheaper
- Cardiogen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- Cartalax
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.00/mg
20 mg · $60.00
checked 30 Oct 2026
Grey Matters Research 53% cheaper
- CJC-1295 NO DAC
Grey Matters Research
$2.60/mg
10 mg · $26.00
checked 18 Aug 2026
Peptide Science Now
$9.90/mg
5 mg · $49.50
checked 30 Oct 2026
Grey Matters Research 74% cheaper
- Cortagen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- DSIP
Grey Matters Research
$1.90/mg
10 mg · $19.00
checked 18 Aug 2026
Peptide Science Now
$10.00/mg
5 mg · $50.00
checked 30 Oct 2026
Grey Matters Research 81% cheaper
- Epithalon
Grey Matters Research
$1.10/mg
20 mg · $22.00
checked 18 Aug 2026
Peptide Science Now
$3.80/mg
50 mg · $190.00
checked 30 Oct 2026
Grey Matters Research 71% cheaper
- GHK Basic
Grey Matters Research
$0.180/mg
100 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$1.10/mg
50 mg · $55.00
checked 30 Oct 2026
Grey Matters Research 84% cheaper
- Glutathione
Grey Matters Research
$0.012/mg
1500 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$0.142/mg
600 mg · $85.00
checked 30 Oct 2026
Grey Matters Research 92% cheaper
- Hexarelin
Grey Matters Research
$3.60/mg
5 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$9.00/mg
5 mg · $45.00
checked 30 Oct 2026
Grey Matters Research 60% cheaper
- Humanin
Grey Matters Research
$2.80/mg
10 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$13.00/mg
10 mg · $130.00
checked 30 Oct 2026
Grey Matters Research 78% cheaper
- IGF-1 LR3
Grey Matters Research
$34.00/mg
1 mg · $34.00
checked 18 Aug 2026
Peptide Science Now
$110.00/mg
1 mg · $110.00
checked 30 Oct 2026
Grey Matters Research 69% cheaper
- Ipamorelin
Grey Matters Research
$1.80/mg
10 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$8.00/mg
10 mg · $80.00
checked 30 Oct 2026
Grey Matters Research 78% cheaper
- Kisspeptin
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Peptide Science Now
$13.00/mg
5 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 88% cheaper
- KPV
Grey Matters Research
$1.07/mg
30 mg · $32.00
checked 18 Aug 2026
Peptide Science Now
$11.00/mg
5 mg · $55.00
checked 30 Oct 2026
Grey Matters Research 90% cheaper
- LL-37
Grey Matters Research
$3.60/mg
5 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$19.00/mg
5 mg · $95.00
checked 30 Oct 2026
Grey Matters Research 81% cheaper
- Melanotan 1
Grey Matters Research
$1.50/mg
10 mg · $15.00
checked 18 Aug 2026
Peptide Science Now
$5.50/mg
10 mg · $55.00
checked 30 Oct 2026
Grey Matters Research 73% cheaper
- MOTS-C
Grey Matters Research
$1.00/mg
40 mg · $40.00
checked 18 Aug 2026
Peptide Science Now
$11.00/mg
10 mg · $110.00
checked 30 Oct 2026
Grey Matters Research 91% cheaper
- NAD+
Grey Matters Research
$0.028/mg
1000 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$0.400/mg
750 mg · $300.00
checked 30 Oct 2026
Grey Matters Research 93% cheaper
- Oxytocin
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Peptide Science Now
$6.50/mg
10 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 75% cheaper
- Pancragen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- PEG-MGF
Grey Matters Research
$9.00/mg
2 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$19.00/mg
5 mg · $95.00
checked 30 Oct 2026
Grey Matters Research 53% cheaper
- Pinealon
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.75/mg
20 mg · $75.00
checked 30 Oct 2026
Grey Matters Research 63% cheaper
- Prostamax
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- Retatrutide
Grey Matters Research
$1.22/mg
60 mg · $73.00
checked 18 Aug 2026
Peptide Science Now
$15.83/mg
12 mg · $190.00
checked 30 Oct 2026
Grey Matters Research 92% cheaper
- Selank
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Peptide Science Now
$5.50/mg
10 mg · $55.00
checked 30 Oct 2026
Grey Matters Research 71% cheaper
- Semaglutide
Grey Matters Research
$1.70/mg
10 mg · $17.00
checked 18 Aug 2026
Peptide Science Now
$22.50/mg
10 mg · $225.00
checked 30 Oct 2026
Grey Matters Research 92% cheaper
- Semax
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Peptide Science Now
$2.50/mg
30 mg · $75.00
checked 30 Oct 2026
Grey Matters Research 36% cheaper
- SS-31
Grey Matters Research
$1.16/mg
50 mg · $58.00
checked 18 Aug 2026
Peptide Science Now
$6.00/mg
25 mg · $150.00
checked 30 Oct 2026
Grey Matters Research 81% cheaper
- TB-500
Grey Matters Research
$1.80/mg
10 mg · $18.00
checked 18 Aug 2026
Peptide Science Now
$13.50/mg
10 mg · $135.00
checked 30 Oct 2026
Grey Matters Research 87% cheaper
- Testagen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- Thymalin
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Peptide Science Now
$6.00/mg
20 mg · $120.00
checked 30 Oct 2026
Grey Matters Research 73% cheaper
- Thymogen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$4.00/mg
20 mg · $80.00
checked 30 Oct 2026
Grey Matters Research 65% cheaper
- Thymosin Alpha-1
Grey Matters Research
$2.50/mg
10 mg · $25.00
checked 18 Aug 2026
Peptide Science Now
$13.00/mg
10 mg · $130.00
checked 30 Oct 2026
Grey Matters Research 81% cheaper
- Vesilute
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- Vesugen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- Vilon
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Peptide Science Now
$3.25/mg
20 mg · $65.00
checked 30 Oct 2026
Grey Matters Research 57% cheaper
- VIP
Grey Matters Research
$2.20/mg
10 mg · $22.00
checked 18 Aug 2026
Peptide Science Now
$12.50/mg
6 mg · $75.00
checked 30 Oct 2026
Grey Matters Research 82% cheaper
| Peptide | Grey Matters Research | Peptide Science Now | Difference per mg |
|---|---|---|---|
| Adipotide | $3.10/mg 10 mg · $31.00 checked 18 Aug 2026 | $8.90/mg 10 mg · $89.00 checked 30 Oct 2026 | Grey Matters Research 65% cheaper |
| AICAR | $0.300/mg 50 mg · $15.00 checked 18 Aug 2026 | $1.00/mg 50 mg · $50.00 checked 30 Oct 2026 | Grey Matters Research 70% cheaper |
| AOD-9604 | $4.00/mg 5 mg · $20.00 checked 18 Aug 2026 | $10.83/mg 6 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 63% cheaper |
| ARA-290 | $1.19/mg 16 mg · $19.00 checked 18 Aug 2026 | $4.69/mg 16 mg · $75.00 checked 30 Oct 2026 | Grey Matters Research 75% cheaper |
| Cardiogen | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| Cartalax | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.00/mg 20 mg · $60.00 checked 30 Oct 2026 | Grey Matters Research 53% cheaper |
| CJC-1295 NO DAC | $2.60/mg 10 mg · $26.00 checked 18 Aug 2026 | $9.90/mg 5 mg · $49.50 checked 30 Oct 2026 | Grey Matters Research 74% cheaper |
| Cortagen | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| DSIP | $1.90/mg 10 mg · $19.00 checked 18 Aug 2026 | $10.00/mg 5 mg · $50.00 checked 30 Oct 2026 | Grey Matters Research 81% cheaper |
| Epithalon | $1.10/mg 20 mg · $22.00 checked 18 Aug 2026 | $3.80/mg 50 mg · $190.00 checked 30 Oct 2026 | Grey Matters Research 71% cheaper |
| GHK Basic | $0.180/mg 100 mg · $18.00 checked 18 Aug 2026 | $1.10/mg 50 mg · $55.00 checked 30 Oct 2026 | Grey Matters Research 84% cheaper |
| Glutathione | $0.012/mg 1500 mg · $18.00 checked 18 Aug 2026 | $0.142/mg 600 mg · $85.00 checked 30 Oct 2026 | Grey Matters Research 92% cheaper |
| Hexarelin | $3.60/mg 5 mg · $18.00 checked 18 Aug 2026 | $9.00/mg 5 mg · $45.00 checked 30 Oct 2026 | Grey Matters Research 60% cheaper |
| Humanin | $2.80/mg 10 mg · $28.00 checked 18 Aug 2026 | $13.00/mg 10 mg · $130.00 checked 30 Oct 2026 | Grey Matters Research 78% cheaper |
| IGF-1 LR3 | $34.00/mg 1 mg · $34.00 checked 18 Aug 2026 | $110.00/mg 1 mg · $110.00 checked 30 Oct 2026 | Grey Matters Research 69% cheaper |
| Ipamorelin | $1.80/mg 10 mg · $18.00 checked 18 Aug 2026 | $8.00/mg 10 mg · $80.00 checked 30 Oct 2026 | Grey Matters Research 78% cheaper |
| Kisspeptin | $1.60/mg 10 mg · $16.00 checked 18 Aug 2026 | $13.00/mg 5 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 88% cheaper |
| KPV | $1.07/mg 30 mg · $32.00 checked 18 Aug 2026 | $11.00/mg 5 mg · $55.00 checked 30 Oct 2026 | Grey Matters Research 90% cheaper |
| LL-37 | $3.60/mg 5 mg · $18.00 checked 18 Aug 2026 | $19.00/mg 5 mg · $95.00 checked 30 Oct 2026 | Grey Matters Research 81% cheaper |
| Melanotan 1 | $1.50/mg 10 mg · $15.00 checked 18 Aug 2026 | $5.50/mg 10 mg · $55.00 checked 30 Oct 2026 | Grey Matters Research 73% cheaper |
| MOTS-C | $1.00/mg 40 mg · $40.00 checked 18 Aug 2026 | $11.00/mg 10 mg · $110.00 checked 30 Oct 2026 | Grey Matters Research 91% cheaper |
| NAD+ | $0.028/mg 1000 mg · $28.00 checked 18 Aug 2026 | $0.400/mg 750 mg · $300.00 checked 30 Oct 2026 | Grey Matters Research 93% cheaper |
| Oxytocin | $1.60/mg 10 mg · $16.00 checked 18 Aug 2026 | $6.50/mg 10 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 75% cheaper |
| Pancragen | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| PEG-MGF | $9.00/mg 2 mg · $18.00 checked 18 Aug 2026 | $19.00/mg 5 mg · $95.00 checked 30 Oct 2026 | Grey Matters Research 53% cheaper |
| Pinealon | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.75/mg 20 mg · $75.00 checked 30 Oct 2026 | Grey Matters Research 63% cheaper |
| Prostamax | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| Retatrutide | $1.22/mg 60 mg · $73.00 checked 18 Aug 2026 | $15.83/mg 12 mg · $190.00 checked 30 Oct 2026 | Grey Matters Research 92% cheaper |
| Selank | $1.60/mg 10 mg · $16.00 checked 18 Aug 2026 | $5.50/mg 10 mg · $55.00 checked 30 Oct 2026 | Grey Matters Research 71% cheaper |
| Semaglutide | $1.70/mg 10 mg · $17.00 checked 18 Aug 2026 | $22.50/mg 10 mg · $225.00 checked 30 Oct 2026 | Grey Matters Research 92% cheaper |
| Semax | $1.60/mg 10 mg · $16.00 checked 18 Aug 2026 | $2.50/mg 30 mg · $75.00 checked 30 Oct 2026 | Grey Matters Research 36% cheaper |
| SS-31 | $1.16/mg 50 mg · $58.00 checked 18 Aug 2026 | $6.00/mg 25 mg · $150.00 checked 30 Oct 2026 | Grey Matters Research 81% cheaper |
| TB-500 | $1.80/mg 10 mg · $18.00 checked 18 Aug 2026 | $13.50/mg 10 mg · $135.00 checked 30 Oct 2026 | Grey Matters Research 87% cheaper |
| Testagen | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| Thymalin | $1.60/mg 10 mg · $16.00 checked 18 Aug 2026 | $6.00/mg 20 mg · $120.00 checked 30 Oct 2026 | Grey Matters Research 73% cheaper |
| Thymogen | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $4.00/mg 20 mg · $80.00 checked 30 Oct 2026 | Grey Matters Research 65% cheaper |
| Thymosin Alpha-1 | $2.50/mg 10 mg · $25.00 checked 18 Aug 2026 | $13.00/mg 10 mg · $130.00 checked 30 Oct 2026 | Grey Matters Research 81% cheaper |
| Vesilute | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| Vesugen | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| Vilon | $1.40/mg 20 mg · $28.00 checked 18 Aug 2026 | $3.25/mg 20 mg · $65.00 checked 30 Oct 2026 | Grey Matters Research 57% cheaper |
| VIP | $2.20/mg 10 mg · $22.00 checked 18 Aug 2026 | $12.50/mg 6 mg · $75.00 checked 30 Oct 2026 | Grey Matters Research 82% cheaper |
Only at Grey Matters Research: 15 peptides in the same market
Only at Peptide Science Now: 28 peptides in the same market
- B7-33
- BPC-157
- Bronchogen
- Cagrilintide
- Chonluten
- Follistatin-315
- Follistatin-344
- FOXO4-DRI
- GHK-Cu
- GHRH
- GHRP-2
- GHRP-6
- Gonadorelin
- hGH Fragment 176-191
- Livagen
- MGF
- N-Acetyl Epithalon Amidate
- N-Acetyl Selank Amidate
- N-Acetyl Semax Amidate
- P21
- PNC-27
- Sermorelin
- TB-500 Fragment
- Tirzepatide
- Triptorelin
- Melanotan 2(Bulk)
- PT-141(Bulk)
- Tesamorelin(Bulk)
Grey Matters Research compared with
- Huaian Hanyou Peptide52 shared
- Peptides GG50 shared
- Peptides direct to you49 shared
- VPeptide48 shared
- Lab Ratz Research47 shared
- Luxe Peptides46 shared
- Research1peptides46 shared
- Core Peptides45 shared
- Raw Amino45 shared
- TrueLab Peptides44 shared
- NHOV43 shared
- Prime Longevity Peptides43 shared
- Eppixlabs42 shared
- Priority Peptides42 shared
- Peptide Science Store41 shared
- Cenexa Labs40 shared
- Grey Axis Research40 shared
- LabFirst Peptides40 shared
- Nexus Bio Life40 shared
- Amino Usa39 shared
- Nordsci Peptides39 shared
- Vipris Biotechnology39 shared
- Catalyst Peptides38 shared
- Eros Peptides38 shared
- OP Labs38 shared
- Pure Lab Peptides38 shared
- Biotech Peptides36 shared
- Alpha Peptides34 shared
- SQS Research33 shared
- Bridge Research32 shared
Peptide Science Now compared with
- Peptide Science Store63 shared
- Huaian Hanyou Peptide58 shared
- Peptides direct to you58 shared
- Nordsci Peptides57 shared
- Lab Ratz Research53 shared
- Peptides GG53 shared
- Core Peptides52 shared
- Raw Amino52 shared
- Luxe Peptides51 shared
- NHOV51 shared
- Vipris Biotechnology51 shared
- Amino Usa49 shared
- VPeptide49 shared
- Nexus Bio Life47 shared
- Prime Longevity Peptides45 shared
- Priority Peptides45 shared
- Research1peptides45 shared
- TrueLab Peptides43 shared
- Biotech Peptides42 shared
- Cenexa Labs42 shared
- LabFirst Peptides42 shared
- OP Labs42 shared
- Pure Lab Peptides42 shared
- Grey Axis Research41 shared
- Catalyst Peptides40 shared
- Eppixlabs40 shared
- Eros Peptides40 shared
- Alpha Peptides39 shared
- Bridge Research37 shared
- SQS Research33 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.