CommunityCompound Experiences

Experience with 20mg/wk reta?

46 replies18 peopleMar 29, 2026☆ Follow
Summary

Experiences and safety of retatrutide doses above 12mg weekly near normal BMI?

Participants share personal titration experiences with reta plus cagri, noting slowed loss rates as BMI normalizes and mixed results from pushing past 12mg. Debate focuses on optimizing diet and exercise first versus relying on higher medication doses, with some viewing extra GLP-1 as essential for severe cases and others seeing it as potentially unnecessary. Individual non-response to lower doses or other drugs is highlighted alongside unknown long-term effects of elevated glucagon signaling.

What this discussion establishesWhere people disagree

Whether higher untested doses are justified when weight loss continues at over 1 lb per week, and how much emphasis belongs on lifestyle versus medication escalation.

Still open

Optimal long-term maintenance strategy once normal BMI is reached and true safety profile of doses above 12mg.

Nothing here is advice.

46 replies · 18 people
CopperQuill86archiveopening postMar 29

I'm currently using around 12 milligrams weekly of reta along with 3 milligrams of cagri, though the actual amounts might be a bit lower because of overfill in the vials. My weight loss has slowed down to about 0.18 pounds per day as I get closer to a normal BMI, down from 0.24. I'm thinking about going up to roughly 15 milligrams of reta and 4 of cagri since previous increases have helped. I've seen mentions of people using 20 milligrams of reta weekly and wonder if anyone has details on that or higher amounts than 12.

NorthCinder24archiveMar 29

Maybe I'm overthinking this or still new to it, but when do these GLP-1 drugs stop being a helpful tool and start acting more like a crutch? I haven't gone anywhere near 20 milligrams a week so I can't really speak to that. Even 3 milligrams feels high to me personally. Still, I'm here to learn, so can you share what your eating and training look like? Are those areas already solid and you're still needing more medication? A lot of folks used to say they couldn't lose weight even in a calorie deficit, and these drugs have shown that's partly true because they fix several underlying issues. At those high numbers though, your body should already be getting the GLP-1 benefits, so are there other life changes worth trying before going past the doses tested in trials?

RustQuill44archiveMar 29
↳ replying to @NorthCinder24

If anything the results have shown the opposite. Eat less, move more, and weight comes down.

ClearBeacon24archiveMar 29
↳ replying to @NorthCinder24

I didn't realize the FDA had issued any guidance on reta since it's still in trials.

CopperQuill86archiveMar 29
↳ replying to @NorthCinder24

I've lost the same amount of weight before using only diet and exercise, but the medications feel much better and safer. The first time around I also lost my gallbladder. At this weight, after losing through diet and exercise alone, I end up in a really bad mental place, constantly thinking about food, running lots of miles daily, and sticking to a strict eating schedule where any small slip can derail everything. I've been through that cycle multiple times. On the naive point, yes, I think it's a bit naive to assume 3 milligrams weekly feels the same for you as it does for everyone else. Phase 2 trials at 12 milligrams showed a large portion of people are non-responders. Some also have bigger weight issues than others. What's your current and highest BMI? Mine are 26 and 49. Max tirzepatide did nothing for my weight loss, though I had plenty of side effects. I don't think that's accurate at all. These drugs work through a specific mechanism.

NorthCinder24archiveMar 29
↳ replying to @RustQuill44

That's why I said to a degree. Some people deal with metabolic adaptation and resistance. You can try fixing that without a GLP-1 but it's much easier with one. There are also insulin sensitivity problems that these drugs help with. Anyone can lose weight in a calorie deficit, sure, but it's definitely harder for some than others.

NorthCinder24archiveMar 29
↳ replying to @CopperQuill86

Sorry, I didn't mean to suggest 3 milligrams should work for you. I understand some people need to go higher. I was just explaining where my comment came from. The first time I lost weight I went from BMI 31 to 23 without any medication and it took two years. This time I started at 28 but I'm mostly using reta for body recomposition, which is why my dose is lower than yours. Your reply actually supports my point. It sounds like you've lost the weight naturally before but the medication makes it easier and better for your mental state. Insulin sensitization, quieting the reward pathways, and possible leptin effects aren't just from the weight loss itself. There's evidence of direct receptor activity. Receptor distribution points to central nervous system effects too. It's also well known that metabolic slowdown happens with calorie deficit weight loss, and GLP-1s help counter that. I didn't intend to sound aggressive, just that I'd hesitate to raise my own dose further without checking every other part of my plan first.

NorthCinder24archiveMar 29
↳ replying to @ClearBeacon24

My mistake, I meant Lilly's clinical trials.

CopperTimber95archiveMar 30
↳ replying to @NorthCinder24

Your reply comes across more like griefing and shaming than actually helping. That said, I also lost a gallbladder and had severe pancreatitis leading to two long hospital stays from keto diets that went wrong. No other diets worked after leaving the army and then spending decades at a desk job. Compound tirzepatide plus diet has gotten me down to my target BMI. With the weight off, exercise became much easier despite four autoimmune conditions that aren't in remission. These GLP-1 drugs have been life-changing for me. My brother who weighs 400 pounds hasn't responded to them at all. Setting aside the willpower debate, some people just draw a bad hand genetically. Good luck on your journey. You might also want to check out some of the good posts on microdosing here. That approach has helped quite a few people.

PlainQuill53archiveMar 30

Personally I'd ask why you'd want to increase the dose when you're still dropping 1.26 pounds a week. That alone makes me think the medication is still working the same and your lower body weight is simply changing daily calorie needs enough to explain the slower rate. If you eat at the calorie level needed for your goal weight, the deficit shrinks and loss slows as you near balance. Unless you're trying to overshoot and then suddenly raise calories to match?

ClearTimber11archiveMar 30

Personally I wouldn't increase the dose if weight loss stops for three weeks. I'm happy losing about half a pound to one pound weekly and don't want to go faster. I've been overweight or obese for years so there's no rush. Slow and steady works for me. But you're the one researching and deciding for yourself.

BlueSignal96archiveMar 30

People should remember not to focus only on pounds lost per week. Percentages matter more. While the big numbers were exciting when you were much heavier, they won't stay the same as you near your target BMI. What percent of body fat relative to total weight were you losing early on versus now? How are your macros? What's your training like? Not trying to attack you, but I've always disliked seeing people pin something and then sit around expecting results. Diet is close to 90 percent and training the rest. I don't even assign a percentage to these peptides because I see them as just one tool to reach the goals you've set. If you have a detailed daily log I'd be happy to help review it and sort things out. I personally think 20 milligrams a week of reta is excessive.

PlainQuill53archiveMar 30
↳ replying to @BlueSignal96

Whoa there. Be careful calling them tools. There are people on this forum with thousands of posts who will jump in to say you're wrong and just raise the dose because they're cheap. I learned that the hard way.

CopperSignal27archiveMar 30

Not exactly the same situation but there are similarities. I'm currently on 16 milligrams of tirz plus 5 of reta plus 0.25 to 0.5 of cagri. I only added the others after most of the weight was gone to make constant hunger easier to handle. Started at 145 kilograms, began with ozempic at 75 kilograms 18 months ago, switched to tirz nine months ago, and added the rest. Now down 54 percent to 66 kilograms. Trying to reach and keep losses above 30 percent or so falls outside what's been studied. Still, plenty of people started with more severe obesity. From what I've read, the reta plus cagri combo is basically the current best approach for receptor targeting, even though the companies won't study it together because they own different drugs. The companies are pushing hard on combo and add-on research, so they believe solutions for weaker responders or more severe obesity will come from combinations. I'm limited on how high I can go though. Even small 1 milligram weekly increases in reta or tirz make side effects worse.

BlueSignal96archiveMar 30
↳ replying to @CopperSignal27

Well said. It's worth noting that figuring out what other metabolic issues someone has is important. You'll want a good doctor or at least one willing to order plenty of blood work, especially specific markers you request, because most general practitioners don't know much about these things. Luckily we have more tools available now. I'm helping someone right now who was extremely obese with triple bypass and heart failure. He's down from 400 pounds to 350 in three months. I want him at 220 in the next 64 weeks. His fasting glucose has improved a lot and insulin sensitivity is much better. I'm not telling him exactly what to take, just guiding him and providing a meal plan and exercise routine at no cost because I care about the guy. I care about everyone, maybe too much sometimes. My wife once told me I can't save all the whales. No pun intended on her part but kind of funny.

BlueMarble65archiveMar 30

Still losing, so I wouldn't push to extreme doses.

SlowLedger42archiveMar 31

One thing worth thinking about when raising GLP doses past what's been studied is what other risks might appear besides the usual side effects getting stronger. Since reta also acts as a glucagon agonist, it's reasonable to wonder if that part could cause anything unexpected at higher amounts. While GLPs in general raise insulin to some extent, that rise is capped by what your beta cells can actually make no matter how much you stimulate the receptor. With reta it's not making your alpha cells produce more glucagon but instead mimicking glucagon directly because the fake glucagon is part of the molecule itself. So raising the reta dose keeps raising effective glucagon levels in the blood without your body being able to set an upper limit. I'll admit part of me wonders how safe nonstop 24/7 glucagon agonism really is. I guess we'll all find out together in five to ten years. But the point is that glucagon is a

SharpCinder28archiveMar 31
↳ replying to @SlowLedger42

Love it. Another option would be adding a testosterone boost along with the tesa. For the Meso crowd that might appeal.

WryAnchor81archiveMar 31

Way too high from what I've read.

SharpLantern71archiveMar 31

I actually ran a small test when I was at 12 milligrams. Week one at 13, week two at 14, week three at 15, then back to 12. Honestly I couldn't notice any difference. No extra side effects, no change in weight loss, just the same steady progress as before.

NorthCinder24archiveMar 31
↳ replying to @PlainQuill53

Yeah I'm learning that too. I guess I've spent too much time on Meso. Didn't think asking about diet and exercise would be taken so badly. Lift weights, do steady cardio, track protein and macros and most of the time weight comes off. Add reta and you'll definitely lose. Relying on the drug as the main driver doesn't make sense to me. Can you get more sleep? Can you add a few thousand steps a day? Can you tweak your diet a bit? Those are the questions I think should come before going past the highest tested dose of a drug, especially when it's still working.

SharpCinder28archiveMar 31
↳ replying to @NorthCinder24

Probably because you don't have much of a GLP deficiency, if any. In that case these drugs act more like a tool since you didn't really need them to begin with.

BlueSignal49archiveMar 31
↳ replying to @NorthCinder24

If you even suggest on reddit that someone move a little more you're close to getting banned. Probably leftover effects from the body positivity movement that shifted into just using the shots without any lifestyle changes.

SlowLedger42archiveMar 31
↳ replying to @SharpCinder28

I'm fine skipping moral arguments about weight loss, but for the most part a GLP deficiency is a made-up idea. Humans didn't suddenly develop one in two generations. It is documented that statins reduce GLP production, so if you're on one that's a real deficiency and probably explains why statin use links to higher diabetes risk. Other drugs likely do the same and modern processed food probably contributes too, along with many other factors. Let's just agree some people will rely mainly on GLPs for weight control while others will use them as an add-on to lifestyle work. Both beat doing nothing. I think our own insecurities make us defensive when someone points out that lifestyle still matters for results.

SharpCinder28archiveMar 31

One theory is that GLP-1 deficiency happens in obesity-related conditions because of problems in the intestinal lumen, and increasing L-cell numbers could help raise GLP-1 output to treat metabolic issues. Whether it's actual deficiency or just functional impairment, L-cells and DPP-4 look worth studying further. There's research on how certain probiotics might improve GLP-1 secretion by protecting L-cells from lipotoxicity and changing gut bacteria in obesity. Obesity links to lower GLP-1 release possibly from free fatty acid damage to L-cells. Some probiotics show anti-apoptotic effects that might help. There are also papers on anti-inflammatory effects of GLP-1 therapies beyond glucose control and on what L-cells are and how to study their secretion.

NorthCinder24archiveMar 31
↳ replying to @SharpCinder28

Is it reasonable to assume reaching a healthier BMI will correct those deficiencies or do they persist? In this case the person is already at BMI 26. I'm not saying higher doses don't make sense for people with higher BMIs, but once you're near goal shouldn't the focus shift toward lowering the dose and building lasting habits?

SharpCinder28archiveMar 31
↳ replying to @NorthCinder24

I'm sure that works for some people. Overall the data doesn't look great though. The SURMOUNT-4 results showed people regained a good amount of weight after stopping tirz even while continuing lifestyle changes, and kept gaining. On the other hand, quite a few people here including myself prefer staying on GLPs long term for the health benefits and reduced food noise. I'm surrounded by food all day so I really value not being tempted while on these drugs. The typical American kitchen environment is terrible unless you live alone or have family on board too.

SlowLedger42archiveMar 31
↳ replying to @SharpCinder28

My own theory is that because GLPs have worked so well, people fixate on that one hormone's role in hunger. Then companies market products claiming to naturally raise GLP to profit from the attention. In five years after reta is out longer, researchers will probably start framing obesity as inadequate glucagon signaling instead. The problem with that view is that for most people it's not mainly a hunger issue even though that's how it feels. It's more of a broader metabolic problem where obesity is just one possible result. Suppressing hunger through very high GLP signaling does help with weight loss. If the issue was just GLP being 10 to 15 percent too low then the deficiency idea might hold, but we're not raising it by that small amount. We're pushing it orders of magnitude higher than anything that occurs naturally. It's a clever workaround for a problem elsewhere in the system.

SharpCinder28archiveMar 31

Picking up that steroid comparison once more, it feels like shifting from medically insufficient hormone amounts to levels well beyond the typical range. This differs from those using anabolic compounds under legal limits, since there's no reason to halt these GLP treatments over medical issues. Actually the reverse holds.

PlainAlder11archiveMar 31

I was out at the first three-syllable word. Carry on.

NorthCinder24archiveMar 31
↳ replying to @SharpCinder28

I'm all for micro-dosing once goals are reached and bloodwork and health look good. I know several very fit people, especially women, who micro-dose tirz and it works well for them. I imagine I'll keep using reta off and on in the future because it's making this cut much easier.

PlainQuill53archiveApr 1

I'd just like to ask why you always jump in to defend the original poster from what you see as an attack and keep linking the same couple of threads while also subtly putting down anyone into fitness by suggesting they'd be better off on another forum or calling us bros in a dismissive way. Yet you never stop to ask the original poster why they want to raise the dose when they're still losing 1.26 pounds a week and approaching normal BMI. Everyone has an opinion and that's why we share them, but whenever someone suggests maybe stepping back and looking at the whole picture you derail the thread with double-edged comments about AAS bros. I don't even know what AAS means. Why attack us instead of suggesting the original poster reconsider why 1.26 pounds a week isn't enough before that thinking leads somewhere worse? All we know is what they wrote in the first post.

CopperSignal27archiveApr 1

I'm replying mainly to those earlier comments. Their method might suit cases where someone wants to fine-tune physique or handles only modest extra weight, since smaller amounts combined with added activity can work there. It falls short when applied to extreme excess weight, like the original poster starting near a body mass index of 49 or my own beginning at 52. Folks facing that level have usually spent years trying without success to handle their weight through eating patterns and movement, sometimes seeing short gains that never hold. Long-term results from those approaches stay very weak for extreme cases, and the issue goes far beyond looks or routine, carrying major medical dangers including much higher odds of blood sugar trouble, heart trouble, circulation events, and growths. Full treatment amounts of these medications represent the right path in such situations, provided side effects allow it, since they raise the odds of major reductions and also cut disease chances directly while the weight drops. For body mass indexes well above 40, if progress stalls even at standard levels, exceeding those amounts or mixing options likely carries less danger than stopping altogether. The downsides stay unclear, yet the threats from extreme excess weight run so high that stronger medication use probably does not exceed them. Matters grow trickier when weighing those unknown downsides against gains for people already down quite a bit who aim below a body mass index of 25 to 30, or for milder starting points. Applying the medications without any excess weight to adjust composition leaves the balance of risks and gains entirely open, since no research covers it and large studies may never happen due to cost. In that setting the smallest workable amount makes sense to limit rare but serious problems such as gallbladder stones, pancreatic inflammation, or vision loss, which seem too steep for reaching very low body fat percentages, unlike the fortyfold disease spikes tied to extreme excess weight.

PlainQuill53archiveApr 1
↳ replying to @CopperSignal27

I share the same views as you do in this discussion and others. You come across as more neutral and aware of the situation described. What puzzles me is the way certain individuals react strongly whenever opinions differ slightly from their own, suggesting others leave for different communities because of unresolved personal issues affecting their behavior here, despite everyone aiming to assist similarly. Having joined recently, I can predict when that repeated thread about whether something counts as cheating or assistance will appear. My goal is simply to offer alternative viewpoints based on personal stories to aid with issues, yet it feels restricted by one person's tendency to undermine and subtly criticize any comment not focused on increasing amounts. The original poster mentioned starting at a high body mass index and reaching a much lower one, yet still thinking about further increases beyond recommended levels. We both recognize the progress made, but the focus remains on weekly numerical drops instead of fat percentage shifts. Highlighting this draws similar negative responses. Their current index is close to mine, differing by less than one point. Responding becomes harder with multiple revisions to their messages, now totaling six updates.

PlainQuill53archiveApr 1

You've already edited this twice. It might be better to think about what you want to say first, then read it a couple times and revise before posting so everyone is on the same page. I think every post from you in this thread has been edited, not just the reply to me. Or is that how you try to win these discussions by waiting until someone responds and then adding more info and comments? Literally updated while I was reading this response to you. Let me just ask what your actual input to the original poster was about their situation. What advice did you give? From the current edits I don't see where you offered any information to them. Instead you came here to target another person. Updated again. I can't even keep up with your changes. Also I like how you pointed out where I said I lost weight with help from zepbound. What you don't know is I lost over 100 pounds naturally before, got lazy and gained again, then lost 60 pounds of it before deciding to take what felt like the easy way out for my mindset and situation.

PlainQuill53archiveApr 1

Already edited the post. I was warning someone to be careful so they wouldn't get attacked for their mindset. I didn't mention you and you're not the only one who does it so you must be self-conscious about it. Edited again and again. The comments I've been responding to have been removed for some reason.

NorthCinder24archiveApr 1
↳ replying to @CopperSignal27

I've always backed taking the entire amount. My intent was simply that basics like rest patterns, training habits, and meal choices need sorting first before any big dose increases. That stands out here since the poster has neared a healthy weight range yet keeps dropping pounds. They described logging lots of miles while shedding weight initially. Jogging counts as one of the least useful activities for trimming fat because it spikes hunger levels and few people adjust their effort across different heart-rate ranges. Mixing strength sessions with steady low-intensity cardio tends to deliver better results for fat reduction. This led me to wonder about their overall eating and movement setup. I've encountered plenty of users on these meds who skip consistent nutrition and activity then express surprise at limited progress.

CopperSignal27archiveApr 1

Behavior change as a weight loss strategy can work and creating lasting patterns of eating and exercise is possible, but I'd argue the odds of success with that approach go down as weight goes up. So while it might have decent chances starting at BMI 30 or so, the chances at BMI 40 plus are really poor. Part of it is that people in general aren't great at making long-term changes to well-established behaviors, and it's not unreasonable to think those with severe obesity are a group that's even less successful at it long term, which is partly why their obesity became so bad. I don't see this as a moral failure or willpower problem at all. Any diet and exercise plan that requires constant mental effort to keep going is likely to fail because mental effort is a limited resource that eventually runs out. A lot of people may not agree, but this has been shown repeatedly in many different situations including weight maintenance.

PlainAlder11archiveApr 1

I assume there's an ignore feature here?

RustMarble22archiveApr 1
↳ replying to @CopperQuill86 (opening post)

There's a ton of discussion happening here yet the key idea stands out anyway. Shedding pounds tends to ease up once someone nears their target size whether they take that medication or not. It happens naturally and does not indicate any problem with the person or the treatment. Feeling pleased about dropping more than a pound each week when this near the end feels right.

SharpCinder28archiveApr 1

The original poster seems well aware of the research, more than most, based on their earlier threads and 20 years of personal weight loss experience. Even at BMI 26 it's arguably still safe to lose two pounds a week if using strategies to keep muscle, which is why I liked the mention of tesa and playfully brought up testosterone. More common and safer approaches are obviously protein, resistance training, and creatine. I don't mind a stall if it gives skin or muscle time to adjust, or at least that's what I tell myself. The original poster is already aware of muscle loss as a possible issue with any weight loss. Focusing on bloodwork and body composition can be a relief if the scale isn't moving the way you'd like.

SteadyQuill55archiveApr 2
↳ replying to @PlainAlder11

Absolutely! Tapping their username inside any discussion brings the option up right away. This won't block access to those heated exchanges since replies from others stay visible, although the actual messages stay hidden until selecting the reveal option.

PlainAlder11archiveApr 3
↳ replying to @SteadyQuill55

Appreciate it. There's already a thread like this on another board I moderate. Hadn't checked here until now. The request was for someone besides me.

CopperQuill86archiveApr 4
↳ replying to @PlainQuill53

I was interested in the 20 milligrams weekly number because I saw it mentioned in another thread and I'd like any data on symptoms or results. The 12 milligram limit comes from phase 2 studies that showed diminishing returns for most people at that level, but there are probably individual exceptions. Since it sounds like some people have personal data I'd like to hear from them. I do expect I'll go somewhat higher than 12 milligrams if my weight loss slows and I find I'm responsive to the higher dose. In fact I measure body fat percentage daily by proxy with a waist measurement. My waist shows a linear decrease of 0.03 inches per day, which is about 0.04 percent per day using the Navy equation. I've had dexa scans periodically that confirm the method is roughly accurate. However I've been very muscular at high body weights and could do pull-ups at 270 pounds, so I'm skeptical of the simple idea that muscle is always good and fat is always bad. For many later-life health issues I suspect your body systems only have so much

SlowLedger42archiveApr 4
↳ replying to @CopperQuill86

You raise a good observation here yet a few aspects of that study seem worth looking into more closely. The duration may not have captured steady state effects for the higher amounts tested. Extending it could have let the outcomes for those two higher groups separate even more before leveling off. Matching the groups that started from the same lower amount shows their paths pulling apart. The overlap only appears when placing the faster ramp up group against the slower one and that overlap might stem from how quickly the amounts increased at the beginning rather than the final amounts reached. Those numbers reflect group averages while the spread among participants was wide. It would be interesting to track how one person responds across several different amounts since some react strongly even to small weekly increments while others show little change until amounts rise further. The group averages point toward that pattern being possible. For any single person a plot of total change against amount taken might follow a similar shape though the range of amounts needed would differ between individuals.

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