Peptide Referee

S1 Research review: is it legit?

Live Transparency score 50/100 Checked Oct 15, 2026. Visit s1research.net

Our findings in brief

In short: S1 Research scores 50/100, higher than 51% of the 192 active vendors we track. It's #55 on our best peptide vendors list.

We haven't lab-tested anything from S1 Research, so this covers public evidence only, not product quality. As of Oct 15, 2026:

What checks out

What's missing or unverified

Across 24 peptides that at least three vendors sell, its best prices are typically 49% below the median (23 of 24 below). Compare its prices.

At a glance

Website
s1research.net
Status
Live
Domain registered
May 12, 2025 (17 months ago)
Registrar
HOSTINGER operations, UAB
Domain expires
May 12, 2027
First archived
Jul 20, 2025
Shop platform
WooCommerce
Ships to (stated)
US
Payment (stated)
Card, Zelle
COAs
Generic COAs only
Research-use disclaimer
Yes
Traffic rank (Tranco)
Outside the top 1 million

Transparency checks

Six checks of public information, worth 100 points. The score measures openness, not product quality. How we score.

CheckWhat we foundPointsEvidence
Domain age Registered May 12, 2025 (17 months old) 10/20 Registry record
Public certificates of analysis Only generic or sample COAs are public 12/25 COA page
Independent lab named on COAs No independent lab named 0/10 —
Business identity Company name published (Step One Ventures LLC); no address found 8/15 Company name
Shipping, refund and terms pages Found: terms only 5/15 Where we looked for a shipping page · Terms
Card or PayPal payment (buyer protection) Site lists card and Zelle 15/15 Card, Zelle

Total: 50/100. All six checks completed.

S1 Research prices compared

The lowest price per milligram at S1 Research for each peptide, against the median listing across all vendors we track. Rank 1 = cheapest vendor for that peptide.

Peptide S1 Research $/mg Median $/mg vs median Price rank
GHK-Cu $0.313/mg $0.590/mg −47% 6th of 91
BPC-157 $1.98/mg $5.28/mg −63% 4th of 82
Tesamorelin $2.35/mg $6.62/mg −65% 1st of 78
TB-500 $3.60/mg $6.17/mg −42% 10th of 80
Ipamorelin $2.60/mg $5.42/mg −52% 5th of 77
NAD+ $0.050/mg $0.100/mg −50% 6th of 70
MOTS-c $1.35/mg $3.45/mg −61% 3rd of 81
Cagrilintide $4.40/mg $8.90/mg −51% 6th of 61
BPC-157 + TB-500 blend $2.55/mg $4.67/mg −45% 5th of 41
PT-141 (bremelanotide) $2.00/mg $4.00/mg −50% 5th of 66
KPV $3.00/mg $4.60/mg −35% 9th of 67
KLOW blend (GHK-Cu + KPV + BPC-157 + TB-500) $0.619/mg $1.57/mg −61% 2nd of 16
Epitalon $2.50/mg $3.00/mg −17% 37th of 75
GLOW blend (GHK-Cu + BPC-157 + TB-500) $0.600/mg $1.34/mg −55% 3rd of 13
Sermorelin $3.70/mg $7.50/mg −51% 7th of 62
DSIP $2.20/mg $5.10/mg −57% 2nd of 64
Glutathione $0.025/mg $0.047/mg −46% 6th of 57
Thymosin Alpha-1 $3.85/mg $6.50/mg −41% 7th of 61
IGF-1 LR3 $48.00/mg $70.80/mg −32% 7th of 51
CJC-1295 + Ipamorelin blend $2.70/mg $5.20/mg −48% 4th of 47
5-Amino-1MQ $0.940/mg $2.90/mg −68% 4th of 57
N-Acetyl Selank Amidate $3.50/mg $4.00/mg −12% 6th of 14
N-Acetyl Semax Amidate $3.50/mg $3.50/mg at the median 9th of 15
Tesamorelin + Ipamorelin blend $5.00/mg $7.09/mg −29% 9th of 37

Price index: 0.51 (1.00 = market median; lower is cheaper), across 24 peptides sold by 3+ vendors.

All 30 S1 Research listings, with sizes and prices
Peptide Product Size Price $/mg vs median Stock Vendor's page
5-Amino-1MQ 5-Amino-1MQ 50mg 50 mg $47 $0.940/mg −68% In stock View
BPC-157 BPC-157 10 mg $20 $1.98/mg −63% In stock View
BPC-157 BPC-157 30 mg $60 $2.00/mg −62% In stock View
BPC-157 + TB-500 blend TB-500(TB4) 10mg / BPC-157 10mg 20 mg $51 $2.55/mg −45% In stock View
Cagrilintide Cagrilintide 5 mg $22 $4.40/mg −51% In stock View
Cagrilintide Cagrilintide 10 mg $45 $4.50/mg −49% In stock View
CJC-1295 + Ipamorelin blend CJC-ND 5mg +IPA 5mg 10 mg $27 $2.70/mg −48% In stock View
DSIP DSIP 10mg(9.65mg) 10 mg $22 $2.20/mg −57% In stock View
Epitalon Epitalon 10mg 10 mg $25 $2.50/mg −17% In stock View
GHK-Cu GHK-Cu (6ml Vial) 80 mg $25 $0.313/mg −47% In stock View
GLOW blend (GHK-Cu + BPC-157 + TB-500) GLOW – GHK-CU 50mg/BPC-157 10mg/TB-500 10mg -70mg 70 mg $42 $0.600/mg −55% In stock View
Glutathione Glutathione 1500mg 1500 mg $38 $0.025/mg −46% In stock View
IGF-1 LR3 IGF-1 LR3 1mg 1 mg $48 $48.00/mg −32% Out of stock View
Ipamorelin Ipamorelin 10mg 10 mg $26 $2.60/mg −52% In stock View
KLOW blend (GHK-Cu + KPV + BPC-157 + TB-500) KLOW – GHK-CU 50mg /BPC-157 10mg /TB-500 10mg /KPV 10mg – 80mg 80 mg $50 $0.619/mg −61% In stock View
KPV KPV 10mg 10 mg $30 $3.00/mg −35% In stock View
MOTS-c MOTS-C 40 mg $54 $1.35/mg −61% In stock View
MOTS-c MOTS-C 10 mg $22 $2.20/mg −36% In stock View
N-Acetyl Selank Amidate NA Selank Amidate 10mg 10 mg $35 $3.50/mg −12% In stock View
N-Acetyl Semax Amidate NA Semax Amidate 10mg 10 mg $35 $3.50/mg median In stock View
NAD+ NAD+ pH Balanced 500 mg $25 $0.050/mg −50% In stock View
NAD+ NAD+ pH Balanced 1000 mg $51 $0.051/mg −49% In stock View
PT-141 (bremelanotide) PT-141 10mg 10 mg $20 $2.00/mg −50% In stock View
Sermorelin Sermorelin 10 mg $37 $3.70/mg −51% In stock View
Sermorelin Sermorelin 5 mg $25 $5.00/mg −33% Out of stock View
TB-500 TB-500 (TB4) 10mg 10 mg $36 $3.60/mg −42% In stock View
Tesamorelin Tesamorelin 20 mg $47 $2.35/mg −65% In stock View
Tesamorelin Tesamorelin 10 mg $31 $3.10/mg −53% In stock View
Tesamorelin + Ipamorelin blend Tesamorelin 9mg – Ipamorelin 4mg Blend 13 mg $65 $5.00/mg −29% In stock View
Thymosin Alpha-1 Thymosin Alpha 1 – 10mg 10 mg $39 $3.85/mg −41% In stock View

Prices come from each vendor's public product feed and were last fetched Oct 15, 2026. They exclude shipping and discounts. $/mg uses the labeled amount, not measured content. How we compare prices.

Alternatives to S1 Research

Live vendors selling the same peptides as S1 Research, ranked by transparency score. Payments from vendors never affect this order.

# Vendor Status Transparency Domain age COAs Ships to Prices tracked Lab tests
1 Pure Peptide Labs Live 90/100 12 months Batch COAs public US, worldwide 44 —
2 Peptidology Live 90/100 22 months Batch COAs public US 3 —
3 Eros Peptides Live 87/100 3.4 years Generic COAs only US 14 —
4 Nationwide Peptides Live 85/100 11 months Batch COAs public US 38 —
5 Mile High Compounds Live 85/100 15 months Batch COAs public US, worldwide 2 —

Is something wrong?

If you run S1 Research, or you have evidence that something here is out of date, email [email protected] with a link to the evidence. We re-check within five business days and log every change on our corrections page.

Evidence we used (19)