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Vendor comparison

Core Peptides vs Peptide Science Now

Core Peptides is cheaper per mg on 33 of the 52 peptides they share; Peptide Science Now on 18, the same price on 1.

Across all 52, Core Peptides’s price per mg is a median 3% lower than Peptide Science Now’s.

Core Peptides
Listings on the index
81
Cheaper per mg on
33 of 52 shared
Certificates of analysis on file
none yet
Ships from
United States
Latest price check
6 Nov 2026
Peptide Science Now
Listings on the index
69
Cheaper per mg on
18 of 52 shared
Certificates of analysis on file
none yet
Ships from
United States
Latest price check
30 Oct 2026

Retail 52

Purchases of fewer than 10 vials.

  • Adipotide

    Core Peptides

    $7.80/mg

    10 mg · $78.00

    checked 6 Nov 2026

    Peptide Science Now

    $8.90/mg

    10 mg · $89.00

    checked 30 Oct 2026

    Core Peptides 12% cheaper

  • AOD-9604

    Core Peptides

    $8.20/mg

    5 mg · $41.00

    checked 6 Nov 2026

    Peptide Science Now

    $10.83/mg

    6 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 24% cheaper

  • ARA-290

    Core Peptides

    $5.75/mg

    16 mg · $92.00

    checked 6 Nov 2026

    Peptide Science Now

    $4.69/mg

    16 mg · $75.00

    checked 30 Oct 2026

    Peptide Science Now 18% cheaper

  • B7-33

    Core Peptides

    $10.00/mg

    6 mg · $60.00

    checked 6 Nov 2026

    Peptide Science Now

    $11.67/mg

    6 mg · $70.00

    checked 30 Oct 2026

    Core Peptides 14% cheaper

  • BPC-157

    Core Peptides

    $9.70/mg

    10 mg · $97.00

    checked 6 Nov 2026

    Peptide Science Now

    $9.33/mg

    15 mg · $140.00

    checked 30 Oct 2026

    Peptide Science Now 4% cheaper

  • Bronchogen

    Core Peptides

    $3.40/mg

    20 mg · $68.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.00/mg

    20 mg · $60.00

    checked 30 Oct 2026

    Peptide Science Now 12% cheaper

  • Cardiogen

    Core Peptides

    $3.75/mg

    20 mg · $75.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Peptide Science Now 13% cheaper

  • Cartalax

    Core Peptides

    $3.15/mg

    20 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.00/mg

    20 mg · $60.00

    checked 30 Oct 2026

    Peptide Science Now 5% cheaper

  • Chonluten

    Core Peptides

    $2.55/mg

    20 mg · $51.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 22% cheaper

  • CJC-1295 NO DAC

    Core Peptides

    $8.20/mg

    5 mg · $41.00

    checked 6 Nov 2026

    Peptide Science Now

    $9.90/mg

    5 mg · $49.50

    checked 30 Oct 2026

    Core Peptides 17% cheaper

  • Cortagen

    Core Peptides

    $2.95/mg

    20 mg · $59.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 9% cheaper

  • DSIP

    Core Peptides

    $8.20/mg

    5 mg · $41.00

    checked 6 Nov 2026

    Peptide Science Now

    $10.00/mg

    5 mg · $50.00

    checked 30 Oct 2026

    Core Peptides 18% cheaper

  • Epithalon

    Core Peptides

    $3.60/mg

    25 mg · $90.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.80/mg

    50 mg · $190.00

    checked 30 Oct 2026

    Core Peptides 5% cheaper

  • FOXO4-DRI

    Core Peptides

    $23.50/mg

    10 mg · $235.00

    checked 6 Nov 2026

    Peptide Science Now

    $25.00/mg

    10 mg · $250.00

    checked 30 Oct 2026

    Core Peptides 6% cheaper

  • GHK Basic

    Core Peptides

    $0.980/mg

    50 mg · $49.00

    checked 6 Nov 2026

    Peptide Science Now

    $1.10/mg

    50 mg · $55.00

    checked 30 Oct 2026

    Core Peptides 11% cheaper

  • GHK-Cu

    Core Peptides

    $0.985/mg

    200 mg · $197.00

    checked 6 Nov 2026

    Peptide Science Now

    $1.40/mg

    50 mg · $70.00

    checked 30 Oct 2026

    Core Peptides 30% cheaper

  • GHRP-2

    Core Peptides

    $2.90/mg

    10 mg · $29.00

    checked 6 Nov 2026

    Peptide Science Now

    $5.00/mg

    10 mg · $50.00

    checked 30 Oct 2026

    Core Peptides 42% cheaper

  • GHRP-6

    Core Peptides

    $2.90/mg

    10 mg · $29.00

    checked 6 Nov 2026

    Peptide Science Now

    $5.00/mg

    10 mg · $50.00

    checked 30 Oct 2026

    Core Peptides 42% cheaper

  • Gonadorelin

    Core Peptides

    $9.00/mg

    10 mg · $90.00

    checked 6 Nov 2026

    Peptide Science Now

    $8.50/mg

    10 mg · $85.00

    checked 30 Oct 2026

    Peptide Science Now 6% cheaper

  • Hexarelin

    Core Peptides

    $9.40/mg

    5 mg · $47.00

    checked 6 Nov 2026

    Peptide Science Now

    $9.00/mg

    5 mg · $45.00

    checked 30 Oct 2026

    Peptide Science Now 4% cheaper

  • hGH Fragment 176-191

    Core Peptides

    $8.80/mg

    5 mg · $44.00

    checked 6 Nov 2026

    Peptide Science Now

    $10.83/mg

    6 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 19% cheaper

  • Humanin

    Core Peptides

    $14.70/mg

    10 mg · $147.00

    checked 6 Nov 2026

    Peptide Science Now

    $13.00/mg

    10 mg · $130.00

    checked 30 Oct 2026

    Peptide Science Now 12% cheaper

  • IGF-1 LR3

    Core Peptides

    $150.00/mg

    1 mg · $150.00

    checked 6 Nov 2026

    Peptide Science Now

    $110.00/mg

    1 mg · $110.00

    checked 30 Oct 2026

    Peptide Science Now 27% cheaper

  • Ipamorelin

    Core Peptides

    $8.60/mg

    5 mg · $43.00

    checked 6 Nov 2026

    Peptide Science Now

    $8.00/mg

    10 mg · $80.00

    checked 30 Oct 2026

    Peptide Science Now 7% cheaper

  • Kisspeptin

    Core Peptides

    $6.30/mg

    10 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $13.00/mg

    5 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 52% cheaper

  • KPV

    Core Peptides

    $9.50/mg

    4 mg · $38.00

    checked 6 Nov 2026

    Peptide Science Now

    $11.00/mg

    5 mg · $55.00

    checked 30 Oct 2026

    Core Peptides 14% cheaper

  • Livagen

    Core Peptides

    $3.65/mg

    20 mg · $73.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Peptide Science Now 11% cheaper

  • LL-37

    Core Peptides

    $17.80/mg

    5 mg · $89.00

    checked 6 Nov 2026

    Peptide Science Now

    $19.00/mg

    5 mg · $95.00

    checked 30 Oct 2026

    Core Peptides 6% cheaper

  • Melanotan 1

    Core Peptides

    $4.30/mg

    10 mg · $43.00

    checked 6 Nov 2026

    Peptide Science Now

    $5.50/mg

    10 mg · $55.00

    checked 30 Oct 2026

    Core Peptides 22% cheaper

  • MGF

    Core Peptides

    $10.00/mg

    5 mg · $50.00

    checked 6 Nov 2026

    Peptide Science Now

    $27.00/mg

    5 mg · $135.00

    checked 30 Oct 2026

    Core Peptides 63% cheaper

  • MOTS-C

    Core Peptides

    $11.60/mg

    10 mg · $116.00

    checked 6 Nov 2026

    Peptide Science Now

    $11.00/mg

    10 mg · $110.00

    checked 30 Oct 2026

    Peptide Science Now 5% cheaper

  • NAD+

    Core Peptides

    $0.389/mg

    750 mg · $292.00

    checked 6 Nov 2026

    Peptide Science Now

    $0.400/mg

    750 mg · $300.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • Oxytocin

    Core Peptides

    $5.20/mg

    10 mg · $52.00

    checked 6 Nov 2026

    Peptide Science Now

    $6.50/mg

    10 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 20% cheaper

  • P21

    Core Peptides

    $23.20/mg

    5 mg · $116.00

    checked 6 Nov 2026

    Peptide Science Now

    $24.00/mg

    5 mg · $120.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • Pancragen

    Core Peptides

    $3.15/mg

    20 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • PEG-MGF

    Core Peptides

    $12.60/mg

    5 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $19.00/mg

    5 mg · $95.00

    checked 30 Oct 2026

    Core Peptides 34% cheaper

  • Pinealon

    Core Peptides

    $3.75/mg

    20 mg · $75.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.75/mg

    20 mg · $75.00

    checked 30 Oct 2026

    Same price

  • PNC-27

    Core Peptides

    $27.60/mg

    5 mg · $138.00

    checked 6 Nov 2026

    Peptide Science Now

    $30.00/mg

    5 mg · $150.00

    checked 30 Oct 2026

    Core Peptides 8% cheaper

  • Prostamax

    Core Peptides

    $3.15/mg

    20 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • Selank

    Core Peptides

    $5.20/mg

    10 mg · $52.00

    checked 6 Nov 2026

    Peptide Science Now

    $5.50/mg

    10 mg · $55.00

    checked 30 Oct 2026

    Core Peptides 5% cheaper

  • Semax

    Core Peptides

    $2.52/mg

    25 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $2.50/mg

    30 mg · $75.00

    checked 30 Oct 2026

    Peptide Science Now 1% cheaper

  • Sermorelin

    Core Peptides

    $9.60/mg

    5 mg · $48.00

    checked 6 Nov 2026

    Peptide Science Now

    $8.33/mg

    15 mg · $125.00

    checked 30 Oct 2026

    Peptide Science Now 13% cheaper

  • TB-500

    Core Peptides

    $14.00/mg

    10 mg · $140.00

    checked 6 Nov 2026

    Peptide Science Now

    $13.50/mg

    10 mg · $135.00

    checked 30 Oct 2026

    Peptide Science Now 4% cheaper

  • Testagen

    Core Peptides

    $3.15/mg

    20 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • Thymalin

    Core Peptides

    $5.52/mg

    25 mg · $138.00

    checked 6 Nov 2026

    Peptide Science Now

    $6.00/mg

    20 mg · $120.00

    checked 30 Oct 2026

    Core Peptides 8% cheaper

  • Thymogen

    Core Peptides

    $3.90/mg

    20 mg · $78.00

    checked 6 Nov 2026

    Peptide Science Now

    $4.00/mg

    20 mg · $80.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • Thymosin Alpha-1

    Core Peptides

    $14.90/mg

    10 mg · $149.00

    checked 6 Nov 2026

    Peptide Science Now

    $13.00/mg

    10 mg · $130.00

    checked 30 Oct 2026

    Peptide Science Now 13% cheaper

  • Triptorelin

    Core Peptides

    $27.00/mg

    2 mg · $54.00

    checked 6 Nov 2026

    Peptide Science Now

    $21.00/mg

    2 mg · $42.00

    checked 30 Oct 2026

    Peptide Science Now 22% cheaper

  • Vesilute

    Core Peptides

    $3.20/mg

    20 mg · $64.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 2% cheaper

  • Vesugen

    Core Peptides

    $3.15/mg

    20 mg · $63.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Core Peptides 3% cheaper

  • Vilon

    Core Peptides

    $3.70/mg

    20 mg · $74.00

    checked 6 Nov 2026

    Peptide Science Now

    $3.25/mg

    20 mg · $65.00

    checked 30 Oct 2026

    Peptide Science Now 12% cheaper

  • VIP

    Core Peptides

    $10.67/mg

    6 mg · $64.00

    checked 6 Nov 2026

    Peptide Science Now

    $12.50/mg

    6 mg · $75.00

    checked 30 Oct 2026

    Core Peptides 15% cheaper

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.