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Cheapest · 20mg
$44.99
$2.25/mg at Welli Labs
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Semaglutide

GLP-1 Receptor Agonist

FDA-approved GLP-1 agonist. The most-studied weight management peptide.

Weight researchDiabetes researchMetabolic health

For research use only · Not for human consumption

/ compare by size

Every source for Semaglutide

Affiliate disclosure: purchases through links below may earn us a commission. Rankings are never sold — methodology · full disclosure

Size:
21 sources for 3mg·cheapest $84.13 at AlgoRX·$28.04/mg
#1
AlgoRX
4.7· price unverified
$84.13
$28.04/mg
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#2
Ion Peptide
4.6· price unverified
$86.55
$28.85/mg
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#3
Valor Peptides
4.8· price unverified
$120.09
$90.15
$30.05/mg
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#4
Glow Aminos
4.5· price unverified
$93.67
$31.22/mg
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#5
Lab Sourced
4.7· price unverified
$108.98
$36.33/mg
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#6
Throne
4.7· price unverified
$109.71
$36.57/mg
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#7
Peppy
4.7· price unverified
$112.54
$37.51/mg
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#8
Flawless Compounds
4.7· price unverified
$155.54
$115.58
$38.53/mg
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#9
Biocase Innovations
4.6· price unverified
$117.18
$39.06/mg
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#10
Modified Aminos
4.5· price unverified
$125.32
$41.77/mg
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#11
RetaOneLabs
4.7· price unverified
$132.37
$44.12/mg
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#12
Glacier Aminos
4.6· price unverified
$138.63
$46.21/mg
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#13
EZ Peptides
4.7· price unverified
$139.00
$46.33/mg
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#14
Nano Blue Labs
4.6· price unverified
$139.77
$46.59/mg
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#15
Purus Peptides
4.7· price unverified
$155.81
$51.94/mg
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#16
Good Labs
4.7· price unverified
$160.47
$53.49/mg
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#17
Renova Peptides
4.6· price unverified
$212.88
$179.91
$59.97/mg
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#18
Peptidology
4.8· price unverified
$247.46
$184.27
$61.42/mg
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#19
Felix Chemical Supply
4.5· price unverified
$197.19
$65.73/mg
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#20
FITSKNS
4.6· price unverified
$200.73
$66.91/mg
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#21
Solution Peptides
4.6· price unverified
$203.37
$67.79/mg
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#22
Modern Research Peptides
4.8· price unverified
$78.59
$26.20/mg
Out of stock
#23
Molecular Solutions
4.7· price unverified
$100.99
$33.66/mg
Out of stock
#24
Southern Aminos
4.6· price unverified
$117.23
$39.08/mg
Out of stock
#25
RefillPen
4.5· price unverified
$192.55
$64.18/mg
Out of stock
#26
LA Peptides
4.6· price unverified
$208.41
$69.47/mg
Out of stock
🏆Our pick for Semaglutide
Ascension Peptides
5mg · USA · Card / Crypto / Zelle
  • Third-party tested (Janoshik)
  • COAs provided — Per-batch core, quarterly bonus
  • Highest verification tier in stock
  • 4.8★ community rating
$99.99$40.00
$3.60/mg
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Affiliate link · disclosure
Also solid
AMP Peptides
10mg · $5.40/mg
$54.00
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Double R Labs
5mg · $4.25/mg
$24.99
Buy →
Welli Labs
20mg · $2.25/mg
$44.99
Buy →
/ research index

The research base

Research Maturity
★★★★★
5/5 — Volume of studies
Evidence Strength
★★★★★
5/5 — Quality of evidence

200+ clinical trials. Strongest evidence base for weight research peptides. Works as researched.

/ mechanism of action

How it works

GLP-1 receptor agonist. Decreases appetite, slows gastric emptying, improves insulin sensitivity.

/ research dosing

Common research protocols

Range
0.25 → 0.5 → 1.0 → 1.7 → 2.4 mg/week (FDA titration)
Frequency
Once weekly subcutaneous
Route
Subcutaneous abdomen, thigh, or upper arm
Cycle
Start 0.25mg/week × 4 weeks → 0.5mg/week × 4 weeks → continue escalating monthly to 2.4mg/week target
Research notes

Standard FDA titration schedule for Wegovy. Each dose held minimum 4 weeks before increase. GI side effects (nausea, constipation) most pronounced in first 2 weeks of each new dose. If missing dose: take within 5 days, otherwise skip to next scheduled week.

References
FDA Wegovy labelSTEP-1 NCT03548935PMID: 33567185
FOR RESEARCH USE ONLY. Doses listed are compiled from published research literature, FDA-approved drug labels, and well-documented research community practice. Not medical advice.
/ standalone use

As a solo compound

Strong standalone evidence. Most clinical trials test it alone.

/ side effects

What to know

Common: nausea (30%), GI adjustment. Usually resolve over time.

/ timeline

Realistic expectations

2-4 weeks for appetite suppression, 12+ weeks for significant changes

FOR RESEARCH USE ONLY. Semaglutide is intended for laboratory research and not for human consumption.