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Deer Supply & Research
Retatrutide product photo
Maximum weight loss

Retatrutide

5.0 · 1 review

Strength

$225

$23 per mg

Peptide pen, pen needles, and alcohol wipes.

Independently tested · View report ↗

  • Made in Canada
  • Free shipping over $100
  • Discreet packaging
  • Supplies included

Retatrutide 10mg

$225

Overview

What it is

Retatrutide is a once-weekly injection and the strongest weight-loss medication we sell. It works three signals: GLP-1 and GIP for appetite, plus glucagon, which raises the energy your body burns rather than only lowering what you eat.

  • Who it is for: people who want the most weight loss available, or whose progress on a first- or second-generation GLP has stalled.
  • Participants in the TRIUMPH-1 trial averaged about 28% weight loss.

In the boxPeptide pen, pen needles, and alcohol wipes.

Variable-dose pen. Set any dose your schedule calls for, from your smallest starting dose up to 10 mg, all from this one pen. Name-brand pens deliver a single preset dose. What that means

Lose weight, or get your money back. Weigh in three times a week for your first 30 days on Retatrutide. No progress, and it comes back to us for a refund, less a $25 handling fee. See the details

Dosing

How dosing works

Retatrutide is newer, so this is the titration Deer works from, built for adults living with obesity. The dose rises by 2 mg about every four weeks so your body can adjust, and you slow down or hold if side effects show up.

Reference titration

Weekly subcutaneous injection

  1. Weeks 1-42 mg
  2. Weeks 5-84 mg
  3. Weeks 9-126 mg
  4. Weeks 13-168 mg
  5. Weeks 17-2010 mg
  6. Week 21+12 mgMax

The highest dose tends to deliver the most weight loss, but where you settle is personal, shaped by your weight data, appetite suppression, side effects, and other health markers. Never assume your dose; set it with Deer, and check in about any concerns, especially side effects.

Evidence

How the GLP generations compare

Full comparison →

Average weight loss in the landmark trials

  • Semaglutide~15% · STEP-1
  • Tirzepatide~21% · SURMOUNT-1
  • Retatrutide · this product~28% · TRIUMPH-1

Trial averages from published studies, not a prediction of individual results.

Multi-pack savings

The same pens, cheaper by the pack. Each row compares a pack against buying that many pens one at a time, at your own prices.

PackPer penYou payYou save
60mg × 2$412.50$825$25 (3%)

Savings are measured against the single-pen price you pay, so any discount on your account moves both sides of the comparison.

Questions

Common questions

All FAQs →
How do the weight-loss GLP options differ?

Semaglutide is a GLP-1 option. Tirzepatide targets GLP-1 and GIP pathways. Retatrutide is a third-generation option designed around GLP-1, GIP, and glucagon pathways.

What is a variable-dose pen?

A variable-dose pen lets you set how much you inject, rather than the pen deciding for you. Every Deer pen is one: you can dial any dose on your schedule, from the smallest starting dose up to the highest dose the schedule reaches, or the strength of the pen if that is lower, so a single pen covers your whole titration. The name-brand pens, Ozempic® and Mounjaro®, are the opposite. They are designed to deliver only one preset dose, so every time your dose changes you need a different pen. Follow the instructions included with your pen to set the dose, and the dosing schedule on the product page for what that dose should be each week.

What is your refund policy?

Our flagship Retatrutide product includes an eligibility-based money-back policy. Track your weight at least 3 times per week through your first 30 days, and if you do not see progress you can return your medication for a refund of what you paid, less a $25 handling fee. The full terms and how to claim are at deer.supply/guarantee. Eligibility and individual results depend on health factors, dosing, and adherence. For everything else, orders can be cancelled within 30 minutes of payment; unshipped orders are refunded in full.

What comes with weight-loss peptide pens?

Peptide pens include pen needles, alcohol wipes, and cold packs added as a precaution. The peptides are stable at room temperature, and the cold pack is an added safeguard in transit.

My package arrived warm. Is the product still okay?

Almost always, yes. A warm package does not mean the product has been compromised. These peptides are stable at room temperature and are made to tolerate the warmth and temperature swings that are normal in shipping. In fact, heat-study testing has shown they stay stable, sterile, and fully potent even after extreme heat, about 54°C (130°F), for five days on top of a week at room temperature. The cold pack is included to buffer temperature swings in transit, not to keep your order cold on arrival, so a melted or room-temperature cold pack is common and not a problem. Refrigerate the pens as soon as your order arrives, then give the liquid a quick look before use: the GLP medications (Semaglutide, Tirzepatide, and Retatrutide) should be completely clear, and KLOW should be blue. Do not use any of them if you notice cloudiness, floating particles, a color change, or a cracked pen or broken seal. If anything looks off, email info@deer.supply and we will help.

Reviews

Coming SeptemberFor when a GLP alone is not enoughEloralintide arrives in September, paired with Retatrutide.Join the list

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First order offer

50% off your first month of Retatrutide

Complete the health questionnaire and Deer will review whether the intro Retatrutide offer is a fit. Eligible orders get a money-back refund policy, and a $25 shipping fee applies.

Eligibility and individual results depend on health factors, dosing, and adherence.

Check eligibility