Tirzepatide
The GLP-1 behind Mounjaro and Zepbound. Works on two targets rather than one.
Best value right now · 5 mg
Modern Research
IN STOCKUNTESTED
Per mg62% under the $12.00 median
Vial price5 mg · verified Aug 21
Avg per mg · 5 mg
$14.40−28.0%
Ranged $14.40 – $24.00 across 34 vendorsCompare 11 vendors · 5 mg
VendorStock
09
Royal PeptidesUNTESTED · OUT
$7.20$36.00
10
Pepvida LabsUNTESTED · OUT
$13.00$65.00
11
Aavant ResearchTRUST 8.7 · OUT
$16.60$83.00
Showing 8 of 11 vendors · 3 more from $7.20/mg
Tirzepatide prices verified Aug 21, 2026
$4.60/mgModern Research · $22.99
Buy best pricePrice movement · 30 daysNot enough history yet to state a trend.Cheapest ever recorded: $0.600/mg on Jul 31. Today is 90.5% above that low.
See our top-ranked Tirzepatide vendors
Ranked by Finnrick trust score, independent lab testing, and price.
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Quick Summary
The blockbuster weight-loss drug behind Mounjaro and Zepbound — a once-weekly injection that helps people lose significant body weight while also lowering blood sugar. Available from 34 vendors, priced from $22.99 to $900.00.
Research: In the SURMOUNT-1 trial, tirzepatide 15 mg produced 22.5% mean body weight reduction over 72 weeks, with 57% of participants losing 20% or more of their body weight.
Side effects: Nausea, Diarrhea, Constipation, Vomiting, Injection site reactions
FDA-approvedMounjaro for T2D; Zepbound for weight management
- 30 of 34 vendors currently have it in stock
- Highest-rated vendor: NUPEPS Peptides (9.0 Finnrick score)
- Most common vial size: 30mg
- Category: Weight Loss (GLP-1) — GLP-1 receptor agonists for weight management
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