Semaglutide vs Tirzepatide: The Reddit Debate That Never Ends

Go into any peptide sub. Search semaglutide vs tirzepatide. Sort by new. There's a fresh thread from today, and it's the same argument as the one from last week. And the one from 2023.

I've read too many of these. Let me save you the scroll.

The basics, no fluff

Semaglutide is a GLP-1 receptor agonist. One receptor. Made by Novo Nordisk. Sold as Ozempic for type 2 diabetes and Wegovy for weight management. FDA-approved.

Tirzepatide hits two receptors, GLP-1 and GIP. Made by Eli Lilly. Sold as Mounjaro and Zepbound. Also FDA-approved.

Both are prescription drugs. Both also show up as research compounds from peptide vendors, which is a whole separate can of worms I'll get to.

What the trials said

This is the part that starts most fights, so here are the actual numbers.

Semaglutide's STEP 1 trial: about 15% average body weight loss over 68 weeks.

Tirzepatide's SURMOUNT-1 trial: about 21% in the top group over 72 weeks.

Then Lilly ran a head-to-head. SURMOUNT-5 put the two side by side in people without diabetes. Tirzepatide came out ahead, around 20% versus 14%.

So on paper, tirzepatide wins on weight loss. That's not a Reddit opinion. That's the published data.

Semaglutide vs tirzepatide: why the argument won't die

If tirzepatide wins on the numbers, why is this still a debate? A few reasons.

Semaglutide has more history. It's been on the market longer. There's more long-term safety data, including cardiovascular outcome trials. Some people trust the older compound for that reason. Fair.

Side effects hit people differently. Both cause the same gut stuff: nausea, constipation, the works. But individual reactions vary, and Reddit is basically a giant pile of individual reactions. One guy felt awful on one and fine on the other. So did his cousin, in reverse. Neither of them is data.

Price. Semaglutide has generally been cheaper, especially in the research-vendor space. When money is tight, "good enough and cheaper" beats "better and pricier" for a lot of people.

Tribalism. People pick a side and defend it like a sports team. I don't know why. It's a molecule.

Dosing is the number one topic, and I'm skipping it

Every one of these threads turns into a dosing discussion within about six comments. Not doing that here. These are prescription drugs when a doctor gives them to you, and research compounds when a vendor sells them. Either way, a Reddit comment section isn't where that information should come from.

The sourcing problem nobody wants to talk about

Here's the part that matters if you're in the research space.

Both compounds were on the FDA shortage list for a while, which let compounding pharmacies make them. The FDA has since removed both from that list. Compounding got tighter. Novo and Lilly started suing compounders, telehealth companies, and online sellers.

Result: a lot of people jumped to research vendors. And a lot of research vendors are garbage. Fake COAs. Crypto-only payment. Packages that show up warm after three weeks. Vendors that vanish with your money.

Reminder: research-grade semaglutide and tirzepatide are not FDA-approved products. Only the branded drugs are. What a research vendor sells is for research, full stop.

What I actually look for in a vendor

Simple checklist. Doesn't matter which compound.

• Third-party testing, tied to the specific batch.
• A purity number I can verify, not "pharma grade" marketing.
• Cold shipping that arrives fast.
• Normal payment. If it's crypto-only, I'm out.
• Someone answers the email.

Exactide hits all five. They carry research-grade semaglutide and tirzepatide, both third-party tested at 99% purity or higher with batch-specific COAs. Domestic shipping in 2 to 4 business days, cold-packed, free over $150. No crypto nonsense.

Bottom line

Tirzepatide wins on trial data. Semaglutide wins on track record and price. The Reddit debate will keep going forever because people love arguing.

If you're doing research and need clean material for either one, stop reading vendor drama threads and get it from Exactide.