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Peptide fatigue

8 replies9 peopleJul 15, 2026☆ Follow
Summary

how to handle fatigue while continuing retatrutide or similar peptides after major weight loss

The original poster describes switching from tirzepatide to retatrutide for cost and the glucagon pathway, then experiencing fatigue without strong appetite suppression. Others recommend bloodwork before adding anything, note that muscle preservation requires training and calories, and suggest a bulk phase or oral energy supports instead of more injections. Several users share their own TRT use and DEXA results showing lean mass retention despite ongoing deficits.

What this discussion establishesStill open

what is actually causing the fatigue and whether further peptides or TRT would help

Nothing here is advice.

8 replies · 9 people
PlainCompass18archiveopening postJul 15

After nearly twelve months using these types of compounds and now moving to the triple agonist version, I decided to post about how things have gone. I began the dual agonist at roughly 105 kg with body fat around 32 percent. The aim was straightforward fat reduction for better health plus enough leanness to finally reveal abdominal definition. I continued that medication for eight months while titrating up to the 10 mg level. Side effects stayed almost nonexistent throughout, and it shifted how I related to eating while producing substantial weight reduction. Following a two-month break I moved over to the new agent, mainly because the prior option had become costly and the extra glucagon effect interested me. Dosing started low and split across the week before consolidating into single weekly shots that reached 4 mg for a stretch and then 6 mg. Appetite control never became extreme even at the higher amount, yet the scale kept moving downward. Current weight sits at 75 kg after a total drop near 30 kg. The main drawback turned out to be loss of muscle rather than fat itself, leaving me feeling flatter, smaller, and chronically drained. Shedding the initial 20 kg proved far simpler than addressing the remaining abdominal area. I also tried one recovery-focused compound for three months without clear results on its own, so I discontinued it. Recently I began a growth-hormone-releasing peptide because priorities have shifted toward holding onto muscle and possibly adding some while trimming the final fat layer. Mental exhaustion from repeated injections has set in despite the short needles. At this lighter body weight loose skin and residual fat around the midsection still affect how I see myself and push thoughts of dropping another kilo even though building size makes more sense. I am weighing whether to stack additional secretagogues already on hand or to explore full hormone replacement, though needle aversion makes that leap difficult. Overall energy remains low after the extended deficit, which has reduced training drive compared with earlier periods. Other mitochondrial or recovery peptides have crossed my mind for fatigue relief, yet the idea of managing five separate compounds weekly feels excessive. I would value input from others who reached this stage after similar losses. Options that come to mind include continuing the deficit until the last abdominal fat disappears, gradually raising intake to support muscle gain, adding another secretagogue to the current regimen, or pausing everything extra to allow recovery first. 35-year-old male, 178 cm, with a decent muscle base from five years of inconsistent training.

IronKettle95archiveJul 15

I won't be able to discuss any upcoming actions, however your observations made for pleasant reading. Appreciate it.

GreyWillow31archiveJul 15

I intend to pursue a complete set of blood tests and examine whether any results fall outside the expected range, potentially explaining my ongoing tiredness. Without those results in hand, I'm not inclined to introduce additional items while experiencing such symptoms.

AmberCinder46archiveJul 15
↳ replying to @PlainCompass18 (opening post)

Great work dropping those pounds already. Since shots really bother you, starting daily injections could just increase mental exhaustion. You gain muscle only through actual workouts, not by hanging around the kitchen. These compounds might help out but no big wonders will happen. To shed the final fat layer, keep up the calorie shortage. One option stands out when focusing on belly area reduction. Muscle drop shouldn't be blown out of proportion since apparently much of it comes from the liver. No clue about your age, but beginning replacement therapy means a lifelong commitment.

GreyAlder96archiveJul 15

It reminds me of my situation, though instead of dreading injections I simply feel like finishing my evening wash-up and heading straight to sleep rather than doing the injections. Right now I'm on hormone replacement. I attach far too much of my self-image to staying physically strong. Feeling low after skipping workouts and dropping loads really hit hard. What worked best involved adding food to regain power, keeping things steady for a bit, then dealing with the leftover fat.

LevelThistle44archiveJul 15
↳ replying to @PlainCompass18 (opening post)

At 40 years old and 187 cm tall I run 18 mg of reta plus a quarter milligram of sema alongside 150 mg of test c split across seven shots each week. Side effects have stayed minimal while weight keeps dropping at roughly one percent per week. After the first twenty pounds DEXA results show lean tissue holding up well with under two pounds gone so far. The next scan lands on Monday and I expect a bit of movement there. My work involves some physical effort but I have zero history of serious weight training. Starting weight sat at 282 pounds and the original target was 200 yet I sit at 207 after almost 31 weeks which works out to a 27 percent loss. A while back I shifted focus toward seeing abdominal definition for the first time in my life and the scans suggest that will happen somewhere between 180 and 190 pounds so the updated aim is 182 for a full hundred-pound reduction. The tiredness you mentioned probably stems from the gap between effort and visible change right now and that gap can color how the whole routine feels. Shifting attention to other markers like energy or measurements helps keep things in perspective. My own waist took longer than expected to show progress even after forty or fifty pounds came off and then suddenly everything hung loose. The shirts bought a couple months earlier already look oversized. Checking blood markers for hormones vitamins and overall balance gives another set of concrete checkpoints. Your profile lists the US yet the numbers appear in kilograms so I wonder which side of the ocean you are actually on.

IronCinder96archiveJul 15

I think back to what got me into this at the start and realize plenty of others are facing it too.

GreenSignal63archiveJul 16

Before weight loss meds became common the standard pattern each year involved switching between fat loss and eating more to add size. I wonder if my system just wants that eating phase right now to pack on some muscle since I can always diet strictly later on.

LevelTimber64archiveJul 16

I'm glad things are working out nicely so far. I'm not male and I never get worn out from peptides. Still I'm oddly scared of needles and I've been taking something by mouth that lifts my energy levels concentration and general mood. I understand not wanting daily shots. When I'm low on fluids the jab feels sharper. I stick with the smallest needles. A nurse once mentioned that not drinking enough can make injections or shots stand out more. I've also had blood work done to confirm my health is solid. After getting those results I finished up a cycle with NR and NMN and noticed clear gains. Not sure how it would affect someone your age. I'm closer to the older side than yours. There may be mouth based options that help with vitality and feeling good. Good luck with whatever path you pick.

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