Retatrutide Price and Cost Per Month in 2026

There's no official retatrutide price yet, because no approved version exists anywhere and Lilly hasn't named one. What people pay today is the online price of vials sold outside Lilly's trials: on September 29, 2026, the bigger of two price trackers we checked had 114 listings for a 10 mg vial, from $28.41 to $347, and a median of $6.63 per mg across all vial sizes. At the weekly doses used in Lilly's trials, that works out to about $24 to $387 per 4 weeks in our worked examples below, before supplies.

All prices here are in US dollars and leave out shipping, tax and supplies. Lilly's statements come from its retatrutide FAQ (last updated July 2026) and its July 23, 2026 release; the vial prices come from trackers we checked on September 29, 2026, and they change daily.

Why there's no official retatrutide price yet

As of September 2026, retatrutide is still in Phase 3 trials. Lilly says it "has not been approved by any regulatory agency and is legally available only through Lilly's clinical trials." Its press releases put it more bluntly: retatrutide "cannot be legally sold or marketed for human use."

A price comes after approval. In its July 23, 2026 release, Lilly said it is finishing the manufacturing and quality data package the FDA needs for a Biologics License Application (BLA) and plans to submit retatrutide for US approval in Q1 2027. Review takes months after that. On price itself, Lilly's own FAQ says only that it plans to ensure retatrutide "is priced to reflect the overall value to the healthcare system."

So every number you see online, including the ones on this page, is the price of something Lilly didn't make. Lilly says anything sold to consumers outside its trials is illegal, "with no way to verify its safety, purity or dosing." People also search for the cost of "GLP-3". That's the same drug; Lilly calls the nickname "a scientifically inaccurate label."

Insurance doesn't enter into it yet. There's no approved product for a plan to cover, so every vial bought online is paid out of pocket.

What reta costs online, as listed on September 29, 2026

We checked two price-tracking sites that follow peptide sellers, the kind that show up for "reta price" searches. We aren't naming them or the sellers they list. These are listed prices on one day, before any discount code, not audited ones, and they move often. The table comes from the smaller tracker, which breaks single vials out by size.

The bigger tracker covers far more sellers. It put the median at $6.63 per mg across 481 listings of every size, and at about $8.06 per mg for 10 mg vials alone, where its 114 listings ran from $2.84 to $34.70 per mg. The cheapest price per mg falls as the vial gets bigger, from $4.50 for a 10 mg vial to $2.17 for a 30 mg vial in the table.

What's in these vials is a freeze-dried powder you mix with water yourself. The labels usually say the product isn't meant for people. The FDA has said in writing that it doesn't accept that wording when a seller's website makes clear the product is meant to be injected (more on that below).

Retatrutide cost per month at trial doses

Your monthly cost is your weekly dose times 4, times the price per mg. Vial size only matters through the per-mg price. The table uses the dose steps from Lilly's Phase 3 trials, where people started at 2 mg a week and stepped up every 4 weeks through 4, 6 and 9 mg to 12 mg. That's a description of what the trials did, not a dosing plan: dose decisions belong with a doctor.

Figures are rounded to the dollar. $3 per mg sits near the cheapest 10 mg listing on the bigger tracker ($2.84); the other two columns are that tracker's medians.

A few things push the real number up. A calendar month holds about 4.3 weekly doses, so add roughly 9% if you budget by month instead of by 4 weeks. Doses don't divide evenly into vials: 48 mg over 4 weeks at 12 mg means 5 vials of 10 mg, with 2 mg left over. And you'll need bacteriostatic water, insulin syringes, alcohol swabs, a sharps container and shipping, none of which are in the table.

Over a year the dose steps add up. Following the trial schedule, the first 16 weeks use 84 mg, and 36 more weeks at 12 mg use 432 mg, for 516 mg in total. That's about $1,548 at $3 per mg, $3,421 at the median and $4,159 at $8.06.

Legitimate routes and what each one costs

Here's how the routes compare on price and on who can use them. The approved drugs are there as options to discuss with a doctor; they aren't retatrutide, and the prices are the makers' own self-pay figures as of September 2026.

For expanded access, Lilly asks doctors, not patients, to contact it through the Lilly Answers Center at 1-800-545-5979, and availability depends on location and supply. Our retatrutide prescription page covers why no doctor can write a normal prescription for retatrutide yet, and where to buy retatrutide walks through each route in more depth.

Our read: the gap is smaller than the headline vial prices suggest. At the 12 mg trial dose and the median online price, 4 weeks of vials costs about $318, against $449 for Zepbound's top doses from Lilly, and the Zepbound comes with an approved label and a known supply chain. The gap is widest at the start: about $53 for 4 weeks at 2 mg, against $299 for Zepbound's 2.5 mg starting dose.

What a low price doesn't buy you

Lilly warns that illicit retatrutide products "may contain unknown ingredients, harmful contaminants and impurities," and may hold "too much or too little active ingredient, or the wrong ingredient entirely." Regulators in the US and the UK have acted against the people selling it.

• The FDA says retatrutide can't be used in compounding under federal law, so a "compounded retatrutide" offer from a clinic or telehealth site isn't a legal pharmacy product either. It has also warned telehealth firms marketing retatrutide, distributors selling the raw ingredient to compounders, and outsourcing facilities repackaging it.
• In a March 31, 2026 warning letter to one online seller, the FDA said labels saying the products weren't meant for people didn't change the fact that the seller's own website showed they were meant as drugs for people. The letter also warned that injectable products can cause serious harm because they bypass some of the body's key defenses.
• On May 28, 2026, the UK's MHRA raided a country estate near Northampton, arrested 2 people and recovered around 12,000 doses of unlicensed weight loss medicines, its largest seizure of these products to date. It believes the site made and shipped products including retatrutide and tirzepatide.

Mixing your own vial adds a second risk. In 2024 the FDA warned about overdoses from compounded semaglutide in multi-dose vials, mostly people drawing up more than their dose, with confusion between milliliters, milligrams and syringe "units" as one cause. That's semaglutide data, not retatrutide, but reta vials are handled the same way.

The price math breaks too. If a vial sold as 10 mg for $60 ($6 per mg) actually holds 8 mg, you're paying $7.50 per mg, 25% more, and you're dosing lower than you think. Nobody publishes how often that happens, which is why the test report matters more than the sticker.

How to sanity-check a price before you pay

Start with the per-mg number, then check whether anything backs it up. Before you compare listings for retatrutide for sale on price, check four things:

1. Divide the listed price by the milligrams on the label, so a 10 mg vial and a 30 mg vial can be compared fairly.
2. Ask for a third-party test report for that specific batch: identity, purity, the amount per vial, and endotoxin or sterility testing where the seller has it.
3. Check that the batch or lot number on the report matches the one on your vial.
4. Look up the lab on the report and whether the report can be verified with it directly.

Red flags to walk away from:

• no batch report, or one report reused across every batch
• claims that the product is approved, "pharmaceutical grade" or made by Lilly
• Lilly branding, or pens (Lilly doesn't sell retatrutide in any form)
• a price far below the median for the same vial size
• no way to contact the seller other than a checkout page

Our retatrutide testing guide explains how to read a test report line by line, and retatrutide vendors covers how to judge a seller. If you're hunting for a discount code, read our retatrutide coupon page first: Lilly has no savings program for retatrutide, so any code is a seller's own markdown.

How much will retatrutide cost when it's approved?

Nobody outside Lilly knows, and we couldn't find a Lilly price estimate anywhere. The inputs we do have: Lilly plans to submit its BLA to the FDA in Q1 2027, the FDA then has to review it, and Lilly has said the price will reflect "the overall value to the healthcare system." Insurance coverage will depend on each plan once there's something to cover.

The nearest reference point is Lilly's own shelf. Zepbound sells self-pay on LillyDirect for $299 to $449 a month, and Foundayo for $149 to $299. Whether retatrutide lands near those numbers or above them is a guess until Lilly announces it.

Until then, if cost is the main barrier, ask your doctor what an approved option would cost you with and without insurance, and search ClinicalTrials.gov for open retatrutide trials near you. Expect slim pickings: as of September 29, 2026, the only Lilly retatrutide study still recruiting was SYNERGY-Outcomes (NCT07165028), for adults with fatty liver disease (MASLD) at higher risk of liver complications. A trial is the one route where the drug is both legal and something you don't pay for.