Peptide Referee

Cheapest peptide vendors, ranked by typical price

97 vendors ranked by how their prices compare with the market, using 2,469 price comparisons from vendors' public product feeds. Refreshed Oct 15, 2026. Vendors with red flags or a recent enforcement action (5) aren't ranked.

Cheap isn't the same as good value. Several of the cheapest vendors publish little about who they are or how they test. Read the transparency score beside each price.

Vendors from cheapest to most expensive

#VendorTypical price vs medianPeptides comparedBelow median onTransparencyCOAs
1 Srylab −72% (kits) 7 7 of 7 25/100 None found
2 Chimera Peptides −67% 29 28 of 29 27/100 Generic COAs only
3 Bulk Peptide Wholesale −58% 51 49 of 51 45/100* Generic COAs only
4 Lyze Labs −58% (kits) 5 5 of 5 75/100 Batch COAs public
5 Bulk Peptide Supply −57% 51 50 of 51 57/100* Generic COAs only
6 Nexaph −57% (kits) 32 32 of 32 45/100* Not checked
7 Atlas Peptides −56% 4 4 of 4 5/100* Not checked
8 S1 Research −49% 24 23 of 24 50/100 Generic COAs only
9 Iron Aminos −43% 34 33 of 34 40/100* Not checked
10 Reta One Labs −40% 19 18 of 19 55/100* Generic COAs only
11 IDUN Peptides −35% 18 17 of 18 50/100* Not checked
12 Aurora Peptides −31% 14 12 of 14 27/100* Generic COAs only
13 Evolve BioPep −29% 27 25 of 27 83/100 Batch COAs public
14 Eros Peptides −29% 14 14 of 14 87/100 Generic COAs only
15 Crush Research −26% 29 25 of 29 10/100* Not checked
16 Puratek Peptides −22% 20 20 of 20 63/100* Batch COAs public
17 Welli Labs −22% 38 35 of 38 10/100* Not checked
18 Nextech Labs −22% 22 19 of 22 60/100 Generic COAs only
19 Modern Research Peptides −21% 32 25 of 32 10/100* Not checked
20 Ramp Peptides −18% 18 15 of 18 47/100 Generic COAs only
21 Peptidology −18% 3 3 of 3 90/100 Batch COAs public
22 Platinum Lion Peptides −16% 16 11 of 16 15/100* Not checked
23 GenPeptide −13% 28 19 of 28 68/100* Batch COAs public
24 Panda Peptide −12% 31 23 of 31 50/100* Batch COAs public
25 Peptide Crafters −12% 46 34 of 46 27/100* Generic COAs only
26 Ion Peptide −12% 39 27 of 39 25/100* Not checked
27 Peptide Plugs −11% 38 24 of 38 57/100* Generic COAs only
28 Geo Peptides −11% 24 16 of 24 52/100 Generic COAs only
29 Southern Aminos −10% 31 19 of 31 10/100* Not checked
30 AIO Peptides −10% 40 28 of 40 52/100 Generic COAs only
31 EZ Peptides −9% 42 30 of 42 75/100* Batch COAs public
32 Regenerative Research −8% 6 3 of 6 32/100* Generic COAs only
33 NuLife Peptides −8% 42 24 of 42 10/100* Not checked
34 Premier Bio Labs −6% 24 16 of 24 72/100 Generic COAs only
35 Voltera Sciences −6% 17 12 of 17 60/100 Batch COAs public
36 Nation Peptides −6% 17 9 of 17 65/100 Generic COAs only
37 PS Peptides −5% 49 30 of 49 22/100* Generic COAs only
38 Alpha Peps −3% 36 20 of 36 78/100 Batch COAs public
39 Lux Synth Aminos −3% 12 6 of 12 28/100* Not checked
40 OROS Research −3% 31 19 of 31 55/100* Not checked
41 Alpha Omega Peptide −2% 7 4 of 7 75/100 Generic COAs only
42 Peptide Maxxing −2% 29 18 of 29 40/100* Batch COAs public
43 PurePeps −2% 43 23 of 43 35/100* Generic COAs only
44 Modern Aminos −1% 41 23 of 41 77/100 Generic COAs only
45 Volta Peptides median 60 30 of 60 70/100 Batch COAs public
46 Hydro Research median 21 10 of 21 80/100 Batch COAs public
47 Bluum Peptides median 3 0 of 3 82/100 Generic COAs only
48 Peptides Warehouse +1% 39 18 of 39 62/100 Generic COAs only
49 Instant Peptides +1% 13 6 of 13 62/100* Generic COAs only
50 Bioscience Peptides +2% 15 6 of 15 25/100* None found
51 Peak Lab Peptides +3% 29 12 of 29 73/100 Batch COAs public
52 Solira +3% 6 3 of 6 57/100 Generic COAs only
53 PX Peptides +4% 12 5 of 12 5/100* Not checked
54 Orbitrex Peptides +6% 25 11 of 25 73/100 Batch COAs public
55 Nationwide Peptides +6% 38 16 of 38 85/100 Batch COAs public
56 Oasis Labs +7% 39 10 of 39 60/100 Generic COAs only
57 Pure Peptide Labs +8% 44 16 of 44 90/100 Batch COAs public
58 Go Alpha Labs +8% 47 18 of 47 83/100 Batch COAs public
59 Peptides World +8% 42 15 of 42 80/100 Generic COAs only
60 Enhanced Chems +9% 17 6 of 17 25/100* Generic COAs only
61 Receptor Chem +11% 21 7 of 21 62/100* Generic COAs only
62 Nupeps +12% 35 7 of 35 40/100* Generic COAs only
63 ANKR Lab +12% 22 5 of 22 73/100 Batch COAs public
64 Apex Amino +13% 35 10 of 35 55/100 Generic COAs only
65 BioEdge Research Labs +13% 15 1 of 15 50/100 Batch COAs public
66 Licensed Peptides +13% 20 7 of 20 62/100 Generic COAs only
67 Biotech Peptides +15% 31 8 of 31 47/100* Generic COAs only
68 Polaris Peptides +15% 36 9 of 36 45/100 None found
69 Excalibur Peptides +16% 5 1 of 5 78/100 Batch COAs public
70 Pure Lab Peptides +17% 59 17 of 59 82/100 Generic COAs only
71 Paramount Peptides +20% 43 14 of 43 65/100 Generic COAs only
72 Injectify +20% 9 4 of 9 32/100* Generic COAs only
73 Synthesis Peptides +21% 5 1 of 5 63/100 Batch COAs public
74 Certified Peptides +25% 39 5 of 39 60/100* Batch COAs public
75 Particle Peptides +25% 9 1 of 9 83/100 Batch COAs public
76 Peptide Labs +27% 31 7 of 31 65/100 Batch COAs public
77 Rhome Research +29% 15 3 of 15 55/100 Generic COAs only
78 Evolve Peptides +30% 37 5 of 37 60/100* Generic COAs only
79 Strand Bio +30% 23 1 of 23 30/100* None found
80 Vertex Labs +30% 8 1 of 8 60/100* Batch COAs public
81 Pure Tested Peptides +32% 21 5 of 21 50/100 Batch COAs public
82 True Form Peptides +38% 22 0 of 22 67/100 Generic COAs only
83 Risynth Bio +40% 23 1 of 23 47/100* Generic COAs only
84 Protide Health +42% 42 3 of 42 75/100 Batch COAs public
85 Polar Peptides +42% 3 0 of 3 60/100 Batch COAs public
86 Oath Research +45% 4 0 of 4 27/100* Generic COAs only
87 American Peptides +45% 39 3 of 39 47/100* Generic COAs only
88 BioLongevity Labs +47% 36 3 of 36 72/100 Generic COAs only
89 Synthro Lab +52% 13 4 of 13 62/100 Generic COAs only
90 Nootropic Source +59% 4 1 of 4 30/100 None found
91 Peptide Pros +61% 20 4 of 20 58/100* Batch COAs public
92 BioCollex Research +63% 17 0 of 17 70/100 Batch COAs public
93 Masters Peptides +65% 16 0 of 16 22/100* Generic COAs only
94 Blue Sky Peptide +68% 36 3 of 36 35/100* Not checked
95 BioInfinity Lab +69% 17 0 of 17 58/100* Batch COAs public
96 Alpha Gen +85% 22 1 of 22 55/100* Batch COAs public
97 Sports Technology Labs +106% 6 0 of 6 48/100* Not checked

Typical price = median of (vendor's lowest $/mg ÷ market median $/mg) across peptides sold by 3+ vendors, using single vials where the vendor sells them. −20% means typically 20% cheaper than the median listing. (kits) = the vendor only sells multi-vial kits, which are cheaper per mg but cost more per order. A transparency score marked * is based on fewer than six checks.

Cheapest vendors with strong transparency (70+)

  1. Lyze Labs: typically 58% below the median, transparency 75/100.
  2. Evolve BioPep: typically 29% below the median, transparency 83/100.
  3. Eros Peptides: typically 29% below the median, transparency 87/100.
  4. Peptidology: typically 18% below the median, transparency 90/100.
  5. EZ Peptides: typically 9% below the median, transparency 75/100.
  6. Premier Bio Labs: typically 6% below the median, transparency 72/100.
  7. Alpha Peps: typically 3% below the median, transparency 78/100.
  8. Alpha Omega Peptide: typically 2% below the median, transparency 75/100.

Cheapest vendor for each peptide

PeptideCheapest in stock$/mgCheapest with a 70+ score$/mg
Semaglutide Srylab (25/100) $1.36/mg Lyze Labs (75/100) $2.02/mg
Retatrutide Nova Peptide (45/100) $1.17/mg Lyze Labs (75/100) $1.97/mg
Tirzepatide Lyze Labs (75/100) $0.880/mg Lyze Labs (75/100) $0.880/mg
BPC-157 Nexaph (45/100) $1.52/mg Eros Peptides (87/100) $2.55/mg
GHK-Cu Nexaph (45/100) $0.170/mg Premier Bio Labs (72/100) $0.290/mg
Cagrilintide Chimera Peptides (27/100) $2.60/mg Eros Peptides (87/100) $6.80/mg
TB-500 Srylab (25/100) $1.80/mg Evolve BioPep (83/100) $3.50/mg
Tesamorelin S1 Research (50/100) $2.35/mg EZ Peptides (75/100) $4.00/mg
CJC-1295 with DAC Chimera Peptides (27/100) $4.16/mg Go Alpha Labs (83/100) $9.00/mg
Ipamorelin Bulk Peptide Wholesale (45/100) $1.75/mg Evolve BioPep (83/100) $3.00/mg
NAD+ Bulk Peptide Supply (57/100) $0.035/mg Premier Bio Labs (72/100) $0.049/mg
MOTS-c Chimera Peptides (27/100) $1.14/mg Evolve BioPep (83/100) $1.50/mg
BPC-157 + TB-500 blend Bulk Peptide Wholesale (45/100) $1.25/mg Eros Peptides (87/100) $3.12/mg
PT-141 (bremelanotide) Chimera Peptides (27/100) $1.00/mg Evolve BioPep (83/100) $2.50/mg
Semax Bulk Peptide Supply (57/100) $1.75/mg Peptides World (80/100) $1.97/mg
Melanotan II Chimera Peptides (27/100) $1.00/mg Evolve BioPep (83/100) $2.50/mg
KPV Nexaph (45/100) $1.43/mg Evolve BioPep (83/100) $2.50/mg
KLOW blend (GHK-Cu + KPV + BPC-157 + TB-500) Bulk Peptide Supply (57/100) $0.563/mg Go Alpha Labs (83/100) $1.62/mg
SS-31 (elamipretide) Alpha Peps (78/100) $1.27/mg Alpha Peps (78/100) $1.27/mg
Selank Bulk Peptide Supply (57/100) $1.75/mg Pure Lab Peptides (82/100) $2.50/mg

Cheap peptides: questions people ask

Which peptide vendor is the cheapest?

Across the peptides it sells that at least three vendors stock, Srylab is typically 72% below the median, the lowest of the 97 vendors we can compare. Its transparency score is 25/100. Among vendors scoring 70 or more, Lyze Labs is cheapest (58% below the median).

Are the cheapest peptides safe to buy?

Price says nothing about what's in a vial. Before buying from a low-price vendor, check its transparency score and its latest batch COA. Our guide on how to check a vendor lists six checks that take about 15 minutes.

How is the price ranking calculated?

For each vendor, we take its lowest price per milligram for every peptide that at least three vendors sell, divide it by that peptide's median listing, and take the median of those ratios. A vendor needs at least three comparable peptides to be ranked. Shipping, discount codes and wholesale lots of more than 20 vials aren't included. More on comparing prices.

Why is a cheap vendor I know missing?

We leave out vendors with documented red flags and vendors named in an FDA warning letter, lawsuit or seizure in the past three years (5 of the 102 we could price). Their prices still appear on each price page and their own profiles. A vendor also needs prices for at least three peptides that other vendors sell.

See also: best peptide vendors · third-party tested vendors · price index.

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