Side-by-side comparison

Semaglutide vs Tirzepatide — Price & Profile Comparison

Semaglutide

GLP-1 PeptideSafety 8/10

Metabolic / weight research

vs

Tirzepatide

GIP/GLP-1 PeptideSafety 8/10

Metabolic / weight research

Semaglutide
Tirzepatide
Cheapest price
$12.75 /10mg
$12.75 /10mg
Vendors stocking
22
29
Safety rating
8/10
8/10
Mol. weight
4,113.58 g/mol
4,813.45 g/mol
Administration
Subcutaneous injection
Subcutaneous injection

The short answer

Semaglutide vs Tirzepatide: which to choose

On price they're close — about $13 vs $13 for the cheapest COA-verified listing. Tirzepatide is the more widely stocked of the two (29 vendors vs 22). Both hold the same 8/10 safety rating in our methodology. They target different goals — Semaglutide is a glp-1 peptide compound while Tirzepatide is a gip/glp-1 peptide one — so they're often complementary rather than direct substitutes.

Price Comparison — 2026

Semaglutide

VendorPrice
Red River Peptides$12.75 /10mgBuy →
CertaPeptides$35.88 /10mgBuy →
Novatherix Laboratories$40.50 /10mgBuy →
Arizen Bio Labs$40.50 /10mgBuy →
Evo Labs Research$42.50 /10mgBuy →
Promino$44.99 /10mgBuy →

Tirzepatide

VendorPrice
Alpha Peptides$12.75 /10mgBuy →
Puratek Peptides$13.49 /10mgBuy →
Red River Peptides$15.58 /10mgBuy →
Hydro Research$20.83 /10mgBuy →
Midwest Peptide$27.00 /10mgBuy →
Glacier Aminos$27.60 /10mgBuy →

Vendors Carrying Both

21 vendors stock both Semaglutide and Tirzepatide — convenient if you want to bundle an order.

Alpha PeptidesSemaglutide: $58.49Tirzepatide: $12.75Visit →
Red River PeptidesSemaglutide: $12.75Tirzepatide: $15.58Visit →
Hydro ResearchSemaglutide: $49.50Tirzepatide: $20.83Visit →
Midwest PeptideSemaglutide: $50.40Tirzepatide: $27.00Visit →
Glacier AminosSemaglutide: $44.99Tirzepatide: $27.60Visit →
CertaPeptidesSemaglutide: $35.88Tirzepatide: $27.68Visit →
ProminoSemaglutide: $44.99Tirzepatide: $29.70Visit →
Chameleon PeptidesSemaglutide: $69.30Tirzepatide: $32.38Visit →
PeptiraSemaglutide: $59.50Tirzepatide: $33.17Visit →
Evo Labs ResearchSemaglutide: $42.50Tirzepatide: $42.50Visit →
Optima SupplySemaglutide: $109.99Tirzepatide: $43.00Visit →
Optimum FormulaSemaglutide: $52.50Tirzepatide: $45.00Visit →
Arizen Bio LabsSemaglutide: $40.50Tirzepatide: $49.50Visit →
Ignite PeptidesSemaglutide: $85.00Tirzepatide: $50.00Visit →
GLP-1 Research LabSemaglutide: $57.50Tirzepatide: $50.00Visit →
Novatherix LaboratoriesSemaglutide: $40.50Tirzepatide: $54.00Visit →
Evolve PeptidesSemaglutide: $84.96Tirzepatide: $55.24Visit →
LA PeptidesSemaglutide: $129.98Tirzepatide: $56.66Visit →
HolasSemaglutide: $63.00Tirzepatide: $63.00Visit →
Woosh LabsSemaglutide: $80.99Tirzepatide: $71.99Visit →
Pinnacle Peptide LabsSemaglutide: $84.98Tirzepatide: $84.99Visit →

Safety Notes

Semaglutide

FDA: FDA-approved (Ozempic/Wegovy)

Extensive safety data; GI side effects common but manageable; cardiovascular benefit; thyroid warning animal-only

Tirzepatide

FDA: FDA-approved (Mounjaro/Zepbound)

Extensive Phase III data; GI side effects manageable; thyroid warning animal-only; strong efficacy

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