Semaglutide
GLP-1 Receptor Agonist — Weekly Dosing
Long-half-life GLP-1 receptor agonist studied in the STEP weight-management trials. Available in five vial sizes from 3 mg through 30 mg to match research-protocol duration; all sizes draw from the same batch and CoA.
14.9%
Body Wt. Loss
~7 days
Half-Life
Once weekly
Dosing
Price
From $44.99
✓ 10% off via PeptidesMuscle
Suggested Protocol
The STEP-1 onboarding tiers: 0.25mg weekly for weeks 1–4, then 0.5mg weekly for weeks 5–8. One 3mg vial covers both tiers with ~0.75mg of headroom for reconstitution loss. A researcher who completes both tiers and intends to continue to the 1.0mg tier typically transitions to the 12mg mid-arc vial from week 9 onward.
The 3mg vial is the smallest semaglutide size, sized deliberately for researchers who have not committed to a full protocol arm yet. The STEP-1 titration schedule opens with four weeks at 0.25mg weekly to assess tolerability before escalation — gastrointestinal side effects (nausea, early satiety, delayed gastric emptying discomfort) tend to surface at this tier and determine whether a subject can proceed. A 3mg vial covers those first four weeks with headroom, and extends through the first 0.5mg tier (weeks 5–8) as well. Twelve weeks of onboarding, one vial.
Available Sizes
Semaglutide — 3mg
Ships from Phiogen · CoA available
$44.99
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Semaglutide — 6mg
Ships from Phiogen · CoA available
$71.99
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Semaglutide — 12mg
Ships from Phiogen · CoA available
$116.99
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Semaglutide — 20mg
Ships from Phiogen · CoA available
$170.99
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Semaglutide — 30mg
Ships from Phiogen · CoA available
$224.99
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Specifications
| Product | Semaglutide |
|---|---|
| Category | Fat Loss / Metabolic |
| Format | Lyophilized powder |
| Price | From $44.99 |
Key Trial Data
| Trial | STEP-1 Trial (2021) |
|---|---|
| Outcome | 14.9% avg. body weight reduction |
| Duration | 68 weeks |
Study-Observed Effects
Covers the full 0.25mg and 0.5mg titration tiers (~weeks 1–8 of STEP-1)
Matches pilot-study and tolerability-assessment economics without wasted peptide
Lowest entry cost for a researcher evaluating whether semaglutide fits a research question
Supports single-subject acute pharmacodynamic probing at sub-maintenance doses
Avoids stability-window pressure that larger vials impose on slow-consumption research
Entry-tier pricing for proof-of-concept arms before committing to maintenance-scale vials
Complementary Compounds
Research Protocol
The STEP-1 onboarding tiers: 0.25mg weekly for weeks 1–4, then 0.5mg weekly for weeks 5–8. One 3mg vial covers both tiers with ~0.75mg of headroom for reconstitution loss. A researcher who completes both tiers and intends to continue to the 1.0mg tier typically transitions to the 12mg mid-arc vial from week 9 onward.
Semaglutide — FAQs
Further Reading
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