Vendor comparison

Grey Matters Research vs Prime Longevity Peptides

Grey Matters Research is cheaper per mg on 43 of the 43 peptides they share.

Across all 43, Grey Matters Research’s price per mg is a median 70% lower than Prime Longevity Peptides’s.

Grey Matters Research

Listings on the index: 56
Cheaper per mg on: 43 of 43 shared
Certificates of analysis on file: none yet
Ships from: United States
Latest price check: 18 Aug 2026

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Prime Longevity Peptides

Listings on the index: 60
Cheaper per mg on: 0 of 43 shared
Certificates of analysis on file: none yet
Ships from: not stated
Latest price check: 5 Nov 2026

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Retail 43

Purchases of fewer than 10 vials.

Adamax
Grey Matters Research
$4.20/mg
10 mg · $42.00
checked 18 Aug 2026
Prime Longevity Peptides
$6.90/mg
10 mg · $69.00
checked 5 Nov 2026
Grey Matters Research 39% cheaper
AICAR
Grey Matters Research
$0.300/mg
50 mg · $15.00
checked 18 Aug 2026
Prime Longevity Peptides
$1.20/mg
50 mg · $60.00
checked 5 Nov 2026
Grey Matters Research 75% cheaper
AOD-9604
Grey Matters Research
$4.00/mg
5 mg · $20.00
checked 18 Aug 2026
Prime Longevity Peptides
$11.00/mg
10 mg · $110.00
checked 5 Nov 2026
Grey Matters Research 64% cheaper
ARA-290
Grey Matters Research
$1.19/mg
16 mg · $19.00
checked 18 Aug 2026
Prime Longevity Peptides
$5.67/mg
15 mg · $85.00
checked 5 Nov 2026
Grey Matters Research 79% cheaper
Cardiogen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
Cartalax
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
Cerebrolysin
Grey Matters Research
$0.533/mg
30 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$1.20/mg
60 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 56% cheaper
CJC-1295 DAC
Grey Matters Research
$4.20/mg
5 mg · $21.00
checked 18 Aug 2026
Prime Longevity Peptides
$16.00/mg
5 mg · $80.00
checked 5 Nov 2026
Grey Matters Research 74% cheaper
CJC-1295 NO DAC
Grey Matters Research
$2.60/mg
10 mg · $26.00
checked 18 Aug 2026
Prime Longevity Peptides
$9.00/mg
10 mg · $90.00
checked 5 Nov 2026
Grey Matters Research 71% cheaper
Cortagen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
DSIP
Grey Matters Research
$1.90/mg
10 mg · $19.00
checked 18 Aug 2026
Prime Longevity Peptides
$7.50/mg
10 mg · $75.00
checked 5 Nov 2026
Grey Matters Research 75% cheaper
Epithalon
Grey Matters Research
$1.10/mg
20 mg · $22.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.20/mg
100 mg · $319.95
checked 5 Nov 2026
Grey Matters Research 66% cheaper
Glutathione
Grey Matters Research
$0.012/mg
1500 mg · $18.00
checked 18 Aug 2026
Prime Longevity Peptides
$0.060/mg
1500 mg · $89.95
checked 5 Nov 2026
Grey Matters Research 80% cheaper
Hexarelin
Grey Matters Research
$3.60/mg
5 mg · $18.00
checked 18 Aug 2026
Prime Longevity Peptides
$11.80/mg
5 mg · $59.00
checked 5 Nov 2026
Grey Matters Research 69% cheaper
Humanin
Grey Matters Research
$2.80/mg
10 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$7.90/mg
10 mg · $79.00
checked 5 Nov 2026
Grey Matters Research 65% cheaper
Ipamorelin
Grey Matters Research
$1.80/mg
10 mg · $18.00
checked 18 Aug 2026
Prime Longevity Peptides
$7.00/mg
10 mg · $70.00
checked 5 Nov 2026
Grey Matters Research 74% cheaper
Kisspeptin
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$11.00/mg
10 mg · $110.00
checked 5 Nov 2026
Grey Matters Research 85% cheaper
KPV
Grey Matters Research
$1.07/mg
30 mg · $32.00
checked 18 Aug 2026
Prime Longevity Peptides
$4.97/mg
30 mg · $149.00
checked 5 Nov 2026
Grey Matters Research 79% cheaper
LL-37
Grey Matters Research
$3.60/mg
5 mg · $18.00
checked 18 Aug 2026
Prime Longevity Peptides
$12.00/mg
10 mg · $120.00
checked 5 Nov 2026
Grey Matters Research 70% cheaper
Melanotan 1
Grey Matters Research
$1.50/mg
10 mg · $15.00
checked 18 Aug 2026
Prime Longevity Peptides
$5.90/mg
10 mg · $59.00
checked 5 Nov 2026
Grey Matters Research 75% cheaper
Melanotan 2
Grey Matters Research
$1.40/mg
10 mg · $14.00
checked 18 Aug 2026
Prime Longevity Peptides
$4.50/mg
10 mg · $45.00
checked 5 Nov 2026
Grey Matters Research 69% cheaper
MOTS-C
Grey Matters Research
$1.00/mg
40 mg · $40.00
checked 18 Aug 2026
Prime Longevity Peptides
$7.50/mg
40 mg · $300.00
checked 5 Nov 2026
Grey Matters Research 87% cheaper
NAD+
Grey Matters Research
$0.028/mg
1000 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$0.180/mg
1000 mg · $180.00
checked 5 Nov 2026
Grey Matters Research 84% cheaper
Ovagen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
Oxytocin
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$6.00/mg
10 mg · $60.00
checked 5 Nov 2026
Grey Matters Research 73% cheaper
Pancragen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
PE-22-28
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$6.90/mg
10 mg · $69.00
checked 5 Nov 2026
Grey Matters Research 77% cheaper
PEG-MGF
Grey Matters Research
$9.00/mg
2 mg · $18.00
checked 18 Aug 2026
Prime Longevity Peptides
$17.00/mg
5 mg · $85.00
checked 5 Nov 2026
Grey Matters Research 47% cheaper
Pinealon
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$4.00/mg
10 mg · $40.00
checked 5 Nov 2026
Grey Matters Research 65% cheaper
Prostamax
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
PT-141
Grey Matters Research
$1.50/mg
10 mg · $15.00
checked 18 Aug 2026
Prime Longevity Peptides
$5.00/mg
10 mg · $50.00
checked 5 Nov 2026
Grey Matters Research 70% cheaper
Selank
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$4.00/mg
25 mg · $99.95
checked 5 Nov 2026
Grey Matters Research 60% cheaper
Semax
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$4.00/mg
25 mg · $99.95
checked 5 Nov 2026
Grey Matters Research 60% cheaper
SNAP-8
Grey Matters Research
$1.00/mg
10 mg · $10.00
checked 18 Aug 2026
Prime Longevity Peptides
$5.90/mg
10 mg · $59.00
checked 5 Nov 2026
Grey Matters Research 83% cheaper
TB-500
Grey Matters Research
$1.80/mg
10 mg · $18.00
checked 18 Aug 2026
Prime Longevity Peptides
$9.16/mg
25 mg · $229.00
checked 5 Nov 2026
Grey Matters Research 80% cheaper
Tesamorelin
Grey Matters Research
$2.40/mg
20 mg · $48.00
checked 18 Aug 2026
Prime Longevity Peptides
$9.16/mg
25 mg · $229.00
checked 5 Nov 2026
Grey Matters Research 74% cheaper
Testagen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
Thymalin
Grey Matters Research
$1.60/mg
10 mg · $16.00
checked 18 Aug 2026
Prime Longevity Peptides
$6.00/mg
10 mg · $60.00
checked 5 Nov 2026
Grey Matters Research 73% cheaper
Thymogen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
Thymosin Alpha-1
Grey Matters Research
$2.50/mg
10 mg · $25.00
checked 18 Aug 2026
Prime Longevity Peptides
$10.99/mg
10 mg · $109.95
checked 5 Nov 2026
Grey Matters Research 77% cheaper
Vesilute
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.93/mg
15 mg · $59.00
checked 5 Nov 2026
Grey Matters Research 64% cheaper
Vesugen
Grey Matters Research
$1.40/mg
20 mg · $28.00
checked 18 Aug 2026
Prime Longevity Peptides
$3.60/mg
20 mg · $71.95
checked 5 Nov 2026
Grey Matters Research 61% cheaper
VIP
Grey Matters Research
$2.20/mg
10 mg · $22.00
checked 18 Aug 2026
Prime Longevity Peptides
$12.00/mg
10 mg · $120.00
checked 5 Nov 2026
Grey Matters Research 82% cheaper

Peptide	Grey Matters Research	Prime Longevity Peptides	Difference per mg
Adamax	$4.20/mg 10 mg · $42.00 checked 18 Aug 2026	$6.90/mg 10 mg · $69.00 checked 5 Nov 2026	Grey Matters Research 39% cheaper
AICAR	$0.300/mg 50 mg · $15.00 checked 18 Aug 2026	$1.20/mg 50 mg · $60.00 checked 5 Nov 2026	Grey Matters Research 75% cheaper
AOD-9604	$4.00/mg 5 mg · $20.00 checked 18 Aug 2026	$11.00/mg 10 mg · $110.00 checked 5 Nov 2026	Grey Matters Research 64% cheaper
ARA-290	$1.19/mg 16 mg · $19.00 checked 18 Aug 2026	$5.67/mg 15 mg · $85.00 checked 5 Nov 2026	Grey Matters Research 79% cheaper
Cardiogen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
Cartalax	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
Cerebrolysin	$0.533/mg 30 mg · $16.00 checked 18 Aug 2026	$1.20/mg 60 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 56% cheaper
CJC-1295 DAC	$4.20/mg 5 mg · $21.00 checked 18 Aug 2026	$16.00/mg 5 mg · $80.00 checked 5 Nov 2026	Grey Matters Research 74% cheaper
CJC-1295 NO DAC	$2.60/mg 10 mg · $26.00 checked 18 Aug 2026	$9.00/mg 10 mg · $90.00 checked 5 Nov 2026	Grey Matters Research 71% cheaper
Cortagen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
DSIP	$1.90/mg 10 mg · $19.00 checked 18 Aug 2026	$7.50/mg 10 mg · $75.00 checked 5 Nov 2026	Grey Matters Research 75% cheaper
Epithalon	$1.10/mg 20 mg · $22.00 checked 18 Aug 2026	$3.20/mg 100 mg · $319.95 checked 5 Nov 2026	Grey Matters Research 66% cheaper
Glutathione	$0.012/mg 1500 mg · $18.00 checked 18 Aug 2026	$0.060/mg 1500 mg · $89.95 checked 5 Nov 2026	Grey Matters Research 80% cheaper
Hexarelin	$3.60/mg 5 mg · $18.00 checked 18 Aug 2026	$11.80/mg 5 mg · $59.00 checked 5 Nov 2026	Grey Matters Research 69% cheaper
Humanin	$2.80/mg 10 mg · $28.00 checked 18 Aug 2026	$7.90/mg 10 mg · $79.00 checked 5 Nov 2026	Grey Matters Research 65% cheaper
Ipamorelin	$1.80/mg 10 mg · $18.00 checked 18 Aug 2026	$7.00/mg 10 mg · $70.00 checked 5 Nov 2026	Grey Matters Research 74% cheaper
Kisspeptin	$1.60/mg 10 mg · $16.00 checked 18 Aug 2026	$11.00/mg 10 mg · $110.00 checked 5 Nov 2026	Grey Matters Research 85% cheaper
KPV	$1.07/mg 30 mg · $32.00 checked 18 Aug 2026	$4.97/mg 30 mg · $149.00 checked 5 Nov 2026	Grey Matters Research 79% cheaper
LL-37	$3.60/mg 5 mg · $18.00 checked 18 Aug 2026	$12.00/mg 10 mg · $120.00 checked 5 Nov 2026	Grey Matters Research 70% cheaper
Melanotan 1	$1.50/mg 10 mg · $15.00 checked 18 Aug 2026	$5.90/mg 10 mg · $59.00 checked 5 Nov 2026	Grey Matters Research 75% cheaper
Melanotan 2	$1.40/mg 10 mg · $14.00 checked 18 Aug 2026	$4.50/mg 10 mg · $45.00 checked 5 Nov 2026	Grey Matters Research 69% cheaper
MOTS-C	$1.00/mg 40 mg · $40.00 checked 18 Aug 2026	$7.50/mg 40 mg · $300.00 checked 5 Nov 2026	Grey Matters Research 87% cheaper
NAD+	$0.028/mg 1000 mg · $28.00 checked 18 Aug 2026	$0.180/mg 1000 mg · $180.00 checked 5 Nov 2026	Grey Matters Research 84% cheaper
Ovagen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
Oxytocin	$1.60/mg 10 mg · $16.00 checked 18 Aug 2026	$6.00/mg 10 mg · $60.00 checked 5 Nov 2026	Grey Matters Research 73% cheaper
Pancragen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
PE-22-28	$1.60/mg 10 mg · $16.00 checked 18 Aug 2026	$6.90/mg 10 mg · $69.00 checked 5 Nov 2026	Grey Matters Research 77% cheaper
PEG-MGF	$9.00/mg 2 mg · $18.00 checked 18 Aug 2026	$17.00/mg 5 mg · $85.00 checked 5 Nov 2026	Grey Matters Research 47% cheaper
Pinealon	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$4.00/mg 10 mg · $40.00 checked 5 Nov 2026	Grey Matters Research 65% cheaper
Prostamax	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
PT-141	$1.50/mg 10 mg · $15.00 checked 18 Aug 2026	$5.00/mg 10 mg · $50.00 checked 5 Nov 2026	Grey Matters Research 70% cheaper
Selank	$1.60/mg 10 mg · $16.00 checked 18 Aug 2026	$4.00/mg 25 mg · $99.95 checked 5 Nov 2026	Grey Matters Research 60% cheaper
Semax	$1.60/mg 10 mg · $16.00 checked 18 Aug 2026	$4.00/mg 25 mg · $99.95 checked 5 Nov 2026	Grey Matters Research 60% cheaper
SNAP-8	$1.00/mg 10 mg · $10.00 checked 18 Aug 2026	$5.90/mg 10 mg · $59.00 checked 5 Nov 2026	Grey Matters Research 83% cheaper
TB-500	$1.80/mg 10 mg · $18.00 checked 18 Aug 2026	$9.16/mg 25 mg · $229.00 checked 5 Nov 2026	Grey Matters Research 80% cheaper
Tesamorelin	$2.40/mg 20 mg · $48.00 checked 18 Aug 2026	$9.16/mg 25 mg · $229.00 checked 5 Nov 2026	Grey Matters Research 74% cheaper
Testagen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
Thymalin	$1.60/mg 10 mg · $16.00 checked 18 Aug 2026	$6.00/mg 10 mg · $60.00 checked 5 Nov 2026	Grey Matters Research 73% cheaper
Thymogen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
Thymosin Alpha-1	$2.50/mg 10 mg · $25.00 checked 18 Aug 2026	$10.99/mg 10 mg · $109.95 checked 5 Nov 2026	Grey Matters Research 77% cheaper
Vesilute	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.93/mg 15 mg · $59.00 checked 5 Nov 2026	Grey Matters Research 64% cheaper
Vesugen	$1.40/mg 20 mg · $28.00 checked 18 Aug 2026	$3.60/mg 20 mg · $71.95 checked 5 Nov 2026	Grey Matters Research 61% cheaper
VIP	$2.20/mg 10 mg · $22.00 checked 18 Aug 2026	$12.00/mg 10 mg · $120.00 checked 5 Nov 2026	Grey Matters Research 82% cheaper

Only at Grey Matters Research: 13 peptides in the same market

Only at Prime Longevity Peptides: 17 peptides in the same market

Grey Matters Research compared with

Prime Longevity Peptides compared with

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.