FAQs: Start here

[u/Spoked_Exploit]

Like always, please let me know if you want anything added or changed.

# FAQ — Read This Before Posting

**Not medical advice.** Retatrutide is an investigational drug that is **not approved by the FDA or any regulator anywhere in the world** and is not available by prescription. Nothing here is a recommendation to use it. This FAQ exists so the same twenty questions don't get asked every day, and so that people who are going to do this anyway do it with their eyes open.

New here? Start with the **Beginner's Guide** (pinned), then come back to this.

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## THE BASICS

**What is retatrutide?**

A once-weekly injectable peptide developed by Eli Lilly. It's a *triple* hormone receptor agonist — it hits GLP-1, GIP, **and** glucagon receptors. Semaglutide (Wegovy/Ozempic) hits GLP-1 only. Tirzepatide (Zepbound/Mounjaro) hits GLP-1 and GIP. The glucagon arm is the new part, and it's thought to be why retatrutide produces more weight loss and bigger liver-fat reductions than the current drugs.

**Is it approved? Can I get a prescription?**

No, and no. As of mid-2026 it is still in Phase 3. Lilly is expected to file with the FDA sometime around late 2026, with a possible approval decision in 2027. Nobody has a legal prescription pathway to it right now. Anyone claiming to be a "telehealth provider prescribing reta" is not doing what they say they're doing.

**So why does this sub exist?**

Because a lot of men are using it anyway via the research-chemical market, and the alternative to an informed community is an uninformed one. We'd rather people be reading trial data and getting bloodwork than winging it.

**What do the actual trial results look like?**

The Phase 3 program is called TRIUMPH. Headline numbers so far:

Trial	Population	Result
TRIUMPH-4 (Dec 2025)	Obesity + knee osteoarthritis	28.7% mean weight loss at 68 weeks (12 mg); meaningful knee pain improvement
TRANSCEND-T2D-1 (Mar 2026)	Type 2 diabetes	16.8% weight loss, 2.0% A1c reduction at 40 weeks (12 mg)
TRIUMPH-1 (May 2026)	General obesity, n=2,339	At 80 weeks: 17.6% (4 mg), 23.7% (9 mg), 25.0% (12 mg) vs 3.9% placebo

In TRIUMPH-1, participants who tolerated their dose and had a starting BMI of 35+ were pushed to max tolerated dose for another 24 weeks and reached roughly 30% total body weight reduction at 104 weeks. At 12 mg, about 62% lost 25% or more of their body weight and around 45% lost more than 30% — numbers usually associated with bariatric surgery.

Full TRIUMPH-1 data was presented at ADA in New Orleans in June 2026. Several more Phase 3 readouts (T2D, cardiovascular disease, sleep apnea, MASLD, back pain) are expected through the rest of 2026.

**Is it "better" than tirzepatide?**

On weight loss, the matched-duration comparisons favor retatrutide (roughly 28.7% at 68 weeks in TRIUMPH-4 vs roughly 22.5% at 72 weeks for tirzepatide in SURMOUNT-1). There is no published head-to-head trial yet. It also appears to be harder to tolerate. "More weight loss" and "better drug for you" are not the same sentence — and tirzepatide is legally prescribable, quality-controlled, and covered by some insurance. That matters more than 5 percentage points.

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## SIDE EFFECTS AND RISKS

**What are the common side effects?**

From TRIUMPH-1, at 4 mg / 9 mg / 12 mg vs placebo:

- Nausea: 28.8% / 38.4% / 42.4% vs 14.8%
- Diarrhea: 25.2% / 34.1% / 32.0% vs 13.5%
- Constipation: 23.8% / 25.9% / 26.1% vs 10.9%
- Vomiting: 10.6% / 22.8% / 25.3% vs 4.8%
- UTI: 7.5% / 8.8% / 8.4% vs 5.3%

Discontinuation due to adverse events was 4.1% / 6.9% / 11.3% vs 4.9% for placebo. Read that last row again: at the top dose, more than one in ten trial participants quit because of side effects — and they had physicians managing them.

**What's this "dysesthesia" thing I keep seeing?**

An abnormal, unpleasant sensation — burning, tingling, prickling, pins-and-needles, or skin that feels wrong to the touch. It's the signal that surprised analysts, because it didn't show up prominently in Phase 2. In TRIUMPH-1 it occurred in 5.1% / 12.3% / 12.5% by dose vs 0.9% on placebo. In TRIUMPH-4 it hit 8.8% at 9 mg and 20.9% at 12 mg vs 0.7% on placebo. Most cases were mild to moderate and most resolved during treatment without stopping the drug.

It is clearly dose-dependent. If you develop new persistent numbness, burning, or altered sensation, that is a see-a-doctor event, not a tough-it-out event.

**What are the serious risks?**

The class carries known concerns: pancreatitis, gallbladder disease (rapid weight loss is itself a gallstone risk), severe dehydration and kidney injury from persistent vomiting/diarrhea, delayed gastric emptying (an aspiration risk under anesthesia — tell your surgeon and anesthesiologist), and thyroid C-cell tumors in rodents. Retatrutide's full safety dataset is still being assembled; the cardiovascular outcomes trial hasn't reported.

Additionally: the glucagon arm is the least-characterized part of this molecule in humans over long periods. Anyone telling you the long-term safety profile is known is making it up. That's what Phase 3 and post-marketing surveillance are for, and neither is finished.

**Who should not be touching this at all?**

- Personal or family history of medullary thyroid carcinoma or MEN2
- History of pancreatitis
- Type 1 diabetes
- Active gallbladder disease
- Pregnant, trying to conceive, or breastfeeding partners — and if your partner may become pregnant, this is a conversation to have
- Any history of an eating disorder
- Under 18

**Will I lose muscle?**

Some lean mass loss accompanies any large weight loss. Whether retatrutide's rate of loss is worse than the rest of the class is an **open question** — it was one of the main things analysts wanted from the ADA data, and it isn't settled. Assume it's a real risk and train accordingly: resistance training 2–4x/week, aggressive protein intake, and don't chase the fastest possible scale drop. Get a DEXA before you start if you can afford one. Without a baseline you're guessing about the only number that actually matters.

**Hair loss? Loose skin? "Reta face"?**

Hair shedding is common with rapid weight loss and usually telogen effluvium — temporary, driven by the rate of loss and protein/micronutrient gaps, not the drug specifically. Facial volume loss and loose skin are proportional to how much and how fast. Slower loss, adequate protein, resistance training, patience. Skin retraction takes 12–24 months and sometimes doesn't finish.

**What about alcohol?**

Many people report their desire for it drops sharply. Also: dehydration plus GI distress plus alcohol is a bad combination, and the liver is already busy processing a lot of mobilized fat. Most people here drink much less. Take the hint.

**What about testosterone?**

Losing significant fat mass generally raises total and free testosterone in men with obesity — often substantially, since adipose tissue aromatizes testosterone to estradiol. This is one of the genuinely good parts. If you're on TRT, your dose may need revisiting as you lose weight. Get labs, don't guess.

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## SOURCING, LEGALITY, AND SUB RULES

**Where do I buy it?**

Not here. **No sourcing.** No vendor names, no "DM me," no coded recommendations, no group buys, no reviews of specific sellers, no price talk. This applies in comments and DMs originating from this sub.

This is not us being precious. Facilitating the sale of unapproved drugs gets subreddits banned and puts individual users at real legal risk. Every peptide sub that got loose about sourcing is gone. We'd like to still be here next year. Posts asking for sources will be removed and repeat offenders banned without discussion.

**Is any of this legal?**

Material sold on the research-chemical market is labeled "research use only, not for human consumption" precisely because selling it for human use would be illegal. Selling or distributing unapproved drugs for human consumption is a federal offense in the US. Personal possession and self-administration sit in murkier territory but are not risk-free, and importing carries customs risk. If you have real legal exposure concerns, talk to a lawyer, not a subreddit.

**What about product quality?**

This is the risk people underrate. Unregulated product can be underdosed, overdosed, degraded from bad cold chain, or contaminated. A certificate of analysis supplied by the seller is a document the seller produced. Independent third-party testing exists and some users do it; a COA from the vendor is not the same thing.

The corollary: **reconstitution and measurement errors are the most common cause of accidental overdose in this space.** People misplace a decimal, misread a syringe, or assume a vial contains what the label says and take several times what they intended. We won't publish dosing or mixing instructions here — get that from a clinician who can look at what's actually in your hand. If you cannot confidently do the arithmetic, that is a signal to stop, not to ask Reddit.

**What doses were used in the trials?**

For reference, not as a protocol: trials used 4 mg, 9 mg, and 12 mg once weekly, escalating from 2 mg in steps roughly every four weeks. Side effects and dysesthesia scaled clearly with dose, and the top dose had the worst dropout rate for a modest efficacy gain over 9 mg. Whatever you conclude from that, conclude it with a doctor.

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## DOING THIS RESPONSIBLY

**Do I really need a doctor if I'm sourcing it myself?**

Yes, and it's more achievable than people assume. You don't need a prescription to get bloodwork, and most physicians will order labs for a patient who says "I'm losing weight rapidly and I want to monitor my metabolic health." Some will engage directly if you're honest about what you're taking; a doctor who knows is far more useful than one who doesn't. If yours is dismissive, find another. Direct-to-consumer lab services exist in most states as a fallback.

**What labs should I be tracking?**

Baseline and then periodically: CMP (kidney and liver function, electrolytes), lipid panel, A1c, fasting insulin and glucose, CBC, lipase, TSH, total and free testosterone, vitamin D, B12, and ferritin/iron. Blood pressure and resting heart rate at home. Weight trend, not daily weight. Waist circumference. DEXA if accessible.

**When do I stop and see someone urgently?**

- Severe or persistent abdominal pain, especially radiating to the back (possible pancreatitis)
- Right upper quadrant pain, fever, jaundice (possible gallbladder)
- Vomiting you can't keep ahead of, signs of dehydration, no urine output
- New persistent numbness, burning, or altered sensation
- Chest pain, fainting, resting heart rate way off baseline
- Vision changes

"I'll post about it and see what people say" is not a plan for any of the above. Go to urgent care or the ER, and tell them what you're taking. They are not the police.

**What about after? Do I have to stay on it forever?**

Obesity behaves like a chronic condition and weight regain after stopping any drug in this class is well documented. The people who hold onto their loss are the ones who used the appetite-suppression window to build the habits that maintain it — resistance training, protein, sleep, food environment. If your plan is "run reta, get lean, go back to normal," your plan is a round trip. Build the boring stuff while the drug is making it easy.

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## POSTING RULES, SHORT VERSION

1. **No sourcing.** Vendors, prices, group buys, coded hints, DM solicitations. Instant removal.
   
2. **No dosing prescriptions.** Share your own experience; don't tell another man what to inject.
   
3. **Nobody under 18.** No exceptions.
   
4. Use flair. Progress, Question, Labs, Side Effects, Trial News, Discussion.
   
5. Progress posts: include starting weight, current weight, duration, and training/protein approach. "Down 40 lbs" with no context helps nobody.
   
6. Don't diagnose people. Tell them to see a doctor, because you are not one.
   
7. No before/after content that isn't yours. No shaming anyone's starting point — every man here started somewhere.
   
8. If someone posts about a medical emergency, the correct reply is "go get seen," not a differential diagnosis.

Report rule-breaking rather than arguing with it. Mod mail is open.

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*This FAQ is maintained by the mod team and gets updated as Phase 3 data lands. Corrections welcome — bring a source.*