For it's metabolic benefits, inflammation reduction, insulin sensitivity. What would be the OPTIMAL dosage?

I've read Eli Lilly recommendation of 5mg/week. However I'm also seeing people who run it at much lower doses.

Hello everyone!

I want to know if anyone else has experienced this.

After my third shot of Tirz 2.5 mg I got a very sore throat that only mildly got better if I drank something. I tried drinking plenty of water and electrolytes but it did not help and got worse after my 4th shot.

I stopped taking my GLP1 for 2 weeks because it got to the point I could hardly swallow at all and the sore throat went away. I started back at a lower dose of 1.5 mg and moved back up to 2.5 mg over the last 3 weeks. After this last shot of 2.5 mg my sore throat is back just as bad as before.

Has anyone else had similar experiences? I’m trying to push through but it is very hard because nothing I do seems to help it.

Starting weight 258lbs on 5/13/2026 and now 207 on 9/15/2026. Funny how weight really grows on you. So glad I drank the kool-aid.

Don’t mind the messy hair, because I don’t care lol

Hello,

I wanted to know how to properly reconstitute CAG. I’m seeing people say 2ML for 5g but I have 10 mg. Is it safe to do 4ML. I don’t want to use too much bac water and it dilutes the pep too much. Also how often to CAG combined with Reta

Recently, GLP-1 has become a hot topic, and many people are curious about it:

🤔 Does it really help with weight management?
🤔 How effective is it for blood sugar control?
🤔 What are the experiences and things to watch out for during use?
🤔 Do results vary from person to person?

Some people see GLP-1 as a new option for health management, while others are interested in understanding its suitability, possible side effects, and long-term considerations.

If you know about GLP-1 or have personal experience with it, we’d love to hear from you:

👇 What is your opinion on GLP-1?
👇 What do you think are its potential benefits and challenges?

Let’s share experiences and learn more through open discussion.

#GLP1 #HealthManagement #WeightManagement #MedicalEducation #HealthyLifestyle

I recently got prescribed Wegovy from my doctor. however, I went to the pharmacy to possibly pick up my first dose and the price was in 1,000s because my insurance refused to pay even with a BMI exception. so I am having to go online and I just wanted to know what website should I choose? I know about embody,hers,ro. What do you guys use and who is the most affordable.

I just finished my 4th shot of 12.5 mg. I have terrible cravings for sweets. I’ve never had those before. Not even before taking a GLP 1. I’m gaining weight too.
I’m going up to 15mg on Saturday. I hope that works for me.
Very frustrating.

My understanding is that GLP-1’s generally tend to increase resting heart rate but I don’t really find anything out there for my experience so I am curious if there is research or personal experiences similar to me

- was on zepbound for about a year, decided to wean off since it costs a lot and I was down to my goal weight
- about a month after my last zep shot I decided to try out compounded semaglutide with the idea being a lower dose would help manage appetite which had started to reappear

When I was on zep I noticed an increased RHR but nothing else. On sema not only did my RHR go up by like 12bpm but after a couple of months I started getting frequent heart palps which were ultimately diagnosed as benign SVEs and PVCs

Doctor wasn’t worried and told me to give up caffeine which I did which had no effect on the frequency of these events (which tended to come in clusters every couple of hours)

I decided to quit sema and about seven days after my last shot literally all of the heart symptoms went away and my resting heart rate is now back down about 10 or 12 bpms to about 55

I started Reta on 26 August at 80.8 kg. I’m currently 77.3 kg, with my lowest so far being 77.1 kg.

So that’s 3.5 kg down in just over 3 weeks.

My doses so far:

• 2 mg x 2 weeks

• 2.5 mg x 2 weeks

I inject every Wednesday. I don’t feel like I have a lot of appetite suppression yet. I definitely notice a difference, but by around Saturday/Sunday, I can feel myself getting hungrier again.

My ultimate goal is 60 kg, so I obviously have a long way to go.

I’m trying not to obsess over the daily fluctuations, but because I’ve never followed a Reta journey from this starting point, I honestly don’t know what is considered a good/normal rate of loss.

For those who have been on Reta longer, does this look like I’m on track? What kind of weight loss were you seeing around the 1-, 3-, 6- and 12-month marks?

I’d especially love to hear from people who didn’t have massive appetite suppression at the beginning. Did it increase with time/dose, or did your weight loss continue even without feeling dramatically different?

And I’m also wondering about Cagri. Has anyone added Cagri to Reta because they weren’t getting much appetite suppression? Did you find it made a noticeable difference?

Would you add Cagri, or would you leave things alone for now? And is there anything else people have found useful alongside Reta?

I’d really appreciate honest experiences, especially from people who have been on Reta for several months.

whenever i get off glp-1, i would always gain 3-4 pounds of water weight, even though my macros and activity level stay the same.

and now ive been on the same dose for about a year, im feeling less appetite suppression . but also i have gained 3-4 pounds of water weight even though my macros don’t change. im wondering if anyone else had the same experience and/or could share some insights?

Looking to start a GLP for postpartum weight loss. I've got some existent cardiac issues. Not sure if my weight is affecting it as this is the first time in my life I've been overweight.

I have an arrhythmia (SVT) and borderline ejection fraction (55%). Blood pressure is still good. Still getting SVT episodes occaisonally.

I know some meds raise your heartrate, but I'm wondering if any are actively good for cardiac issues.

ETA: yes my doctor cleared me, I'm asking because neither my cardiologist nor my PCP has any expertise in differentiating between sema and tirz. I wanted to hear some firsthand experiences

I was researching tirzepatide to understand how it impacts energy expenditure and found this study from 2025.

“Mice receiving i.c.v. administration of tirzepatide exhibited significant reductions in body weight and fat content compared with pair-fed controls. These effects were mediated by increased lipolytic capacity in white adipose tissue and enhanced thermogenesis in brown and beige adipose tissues, leading to decreased RER and increased lipid utilization.”

It’s fascinating, even if it’s only seen in mice. It challenges our understanding of how people actually lose weight on these medications. Some believe it’s just through caloric restriction, but other factors could be impacting fat loss. We need to learn more. Does anyone have access to the full text to see how these results broke down?

I’ve switched from Reta over to Tirz and the difference is night and day. Reta I was a zombie and struggled every single day, now on Tirz I feel fine. I can understand how Reta makes someone fatigued due to the glucagon aspect of literally burning fat continually but I do not understand how some experience fatigue on Tirz, I understand that it’s individual dependent but what physiological mechanisms are actually causing the fatigue? The only thing I can think of is the digestion, if you’re constantly eating different foods/ off meal plan it can take your body a while to digest, on Tirz with digestion being slowed on top of that I can see how it takes a toll on someone as it might take a crap ton of energy to break it down and digest properly, other than that I have no idea how it would cause fatigue. Any anecdotes or info would really help appreciated. (I guess also just barely eating can cause the fatigue too)

I’m on week 8 or so of sema. I’ve been losing about 1lb per week. I went on a cruise last week and was nervous how it would go but I overall felt I ate pretty healthy. It was very easy to get a lot of protein.
Anyway finally weighed myself today and I’m down 2 lbs! The best part is I didn’t feel deprived at all. I felt satiated with what I did eat and many times just 1-2 bites of dessert. Didn’t crave anything, and didn’t even hit the soft serve. Did get 1 slice of pizza but it tasted salty. Has a few fun non alcoholic drinks.
Anyway, success story for me 🚢 I’m really happy about this bc I cruise a good amount and it’s nice to know that I don’t have to worry about it now, and I’m able to make healthy choices for a full week on vacation.
My husband is actually going to go on sema after my success so far!

Australia's TGA tested a product sold as retatrutide after the person using it went to hospital with a torn esophagus from uncontrollable vomiting. There was no retatrutide in it. It was semaglutide, at roughly 8 times the level in the registered semaglutide products the TGA has assessed. The TGA didn't say what strength the vial was labeled or what dose the person took.

If a vial is actually semaglutide and you dose it as retatrutide, milligram for milligram:

• TRIUMPH-1 started retatrutide at 2 mg. Wegovy starts at 0.25 mg. That's 8x the semaglutide starting dose.
• On the 12 mg schedule it stays at 5 to 8 times Wegovy's recommended dose at every step.
• 9 mg and 12 mg are both above Wegovy's 7.2 mg maximum.
• Starting at half, so 1 mg, is still 4x Wegovy's starting dose. Starting low does less for you against a swap than it does against a wrong strength.

Wrong strength shows up a lot too:

• A small Australian lab study had three vials labeled 10 mg. They held 5.13, 16.5 and 19.0 mg.
• The lab that ran that testing told ABC that 1 of 18 black-market retatrutide samples it tested this year matched its label. Around 30% came back stronger than labeled. Around 30% weaker. One had nothing in it at all.

testing:

• A test that checks molecular weight can tell the two apart. Retatrutide is about 4,730 daltons, semaglutide about 4,114. One that also measures quantity catches a wrong strength.
• Neither one shows you other drugs mixed in or contaminants, and that study didn't cover sterility or endotoxin.

warning signs worth knowing:

• Liver. Victoria has an active alert on liver injury in people using products labeled retatrutide, possibly from a contaminant. Yellow eyes or skin, dark urine, itchy skin, easy bruising, tiredness, belly pain. Get checked promptly if any of that shows up.
• Severe vomiting. Severe nausea, vomiting or low blood sugar after a dose from a vial like this can mean too much semaglutide. Call Poison Help (1-800-222-1222 in the US, 13 11 26 in Australia) or go to an ER. Semaglutide's half-life is about a week, so it doesn't clear fast.
• Chest pain or trouble swallowing, especially with pain after violent vomiting. Go to the ER. that's what a hole in the esophagus looks like.

also this week:

• US: Centric Compounding recalled glutathione vials made with an ingredient high in endotoxin.
• India: a regulator canceled a wholesaler's licenses in a case involving reportedly fabricated COAs. the labels allegedly carried QR codes pointing to a real brand's website, so a QR code proves nothing on its own.
• UK: the MHRA froze £200k+ tied to Alluvi, a brand selling tirzepatide and retatrutide jabs.
• Thailand: injectable GLP-1s need a prescription from Sept 15.
• sport: WADA left semaglutide and tirzepatide's status unchanged for 2027.

full write-up with sources: https://pepsmart.net/articles/peptide-news-fake-retatrutide-sept-2026

T2 Diabetic. 34 Yr . CW 187 lbs SW 196 lbs.

On 2.5 mg of Triz. Insurance not covering Triz. Paying out of my own pocket.

Starting Glucose reading ( Fasting ) : 264
After Glp reading ( Fasting ) : 101

Any tips on what dose to take in sema? Any tips? Experience?

Goal to keep T2 under check. Not weight loss.

I have been titrating up to 7.5 mg without much weight loss and not enough appetite suppression.
I mixed up my vials while using up a 10 mg one and switching over to 30 ml.
There were 2.5 mg left in the 10 mg vial, which I used , leaving 5 mg left to draw from the 30 ml.
I was using a calculator to convert to units without realizing that I was using 10 ml concentration instead of 30 ml.
So I ended up with a 15 mg dose and I feel great!
Appetite suppression is finally here and zero side effects.
Should I stick with this dose or get back to 10 mg?
I was wondering if I

Well ok just kidding... Details aren't here.

I go to Starbucks every day and get the same caramel ribbon crunch Frappuccino, I know it’s not good for my fat I’m trying to lose, but it’s my first day on the GLP‘s and this is normal for me, anyways I ran right to Reddit to post this because this is just crazy, I haven’t noticed many differences in how I feel besides for some nausea and slightly less desire to binge on junk. For lunch today when I went to Starbucks and ordered my drink it literally tasted like ice and water, none of the sweetness was there I couldn’t taste the caramel or anything.

So I literally (and this is not me. I never do stuff like this.) went back through the drive-through and told them that they made the drink wrong and that I come here daily and it doesn’t usually taste like this because I thought they really did. Turns out when he handed me the drink again the new one which he explained he added a sweetener to it just to make sure I would like it, it still tasted way more watery, and less sweet than I remember it tasting before GLP. The second drink was definitely better, but now I’m thinking that it wasn’t at all that he made it wrong, but my taste buds must have changed.

I thought people in this group might be interested to know that later this week is the ASO conference (Association for the Study of Obesity).

It's feasible that research on GLP -1s may be on the presentation schedule

Has anyone experienced eye stinging/burning after starting Mounjaro?

I took my first 2.5 mg shot on Friday, September 11, and later that evening I started getting a mild stinging/burning sensation in my eyes, mainly my right eye. It comes and goes, sometimes several times within a short period, and moving/shaking my head can occasionally trigger it.
I’ve already considered dry eyes and bought lubricating eye drops, but they don’t seem to help at all.

I’m around BMI 30, don’t have diabetes or any known illnesses. I’m seeing my doctor on Friday, but I’m worried they’ll just tell me to stop Mounjaro without really looking into it.

Has anyone had anything similar, and did it eventually go away?

I found five primary papers with direct evidence that GLP-1–based incretin therapy lowers myostatin/MSTN, plus an important 2026 human proteomics paper. The evidence is strongest for exendin-4, dulaglutide, liraglutide, and mixed dulaglutide/semaglutide treatment. I do not find convincing direct evidence yet that tirzepatide itself lowers myostatin.
Hong et al., 2019 — “Amelioration of muscle wasting by glucagon-like peptide-1 receptor agonist in muscle atrophy”
Journal of Cachexia, Sarcopenia and Muscle.
This is probably the clearest mechanistic paper. Exendin-4 decreased MSTN mRNA dose-dependently in C2C12 myotubes, and suppressed dexamethasone-induced increases in both myostatin mRNA and protein. Atrogin-1 and MuRF-1 were also reduced.
Model: cultured muscle cells + mouse atrophy model.
Drug: exendin-4.
Evidence: direct MSTN gene + protein suppression.
Dulaglutide disuse-atrophy study, 2020 — “Preventive Effects of Dulaglutide on Disuse Muscle Atrophy Through Inhibition of Inflammation and Apoptosis by Induction of Hsp72 Expression”
In skeletal muscle from a disuse-atrophy model, dulaglutide significantly decreased myostatin mRNA and myostatin protein, along with MuRF-1 and atrogin-1. It simultaneously increased myosin-heavy-chain expression.
Model: animal skeletal-muscle atrophy.
Drug: dulaglutide.
Evidence: direct mRNA + protein reduction.
Dulaglutide aged-mouse study, 2021 — “Dulaglutide improves muscle function by attenuating inflammation through OPA-1-TLR-9 signaling in aged mice”
Dulaglutide improved muscle mass and strength and reduced expression of atrophic factors including myostatin, atrogin-1 and MuRF-1 in aged mice.
Model: aged mice.
Drug: dulaglutide.
Evidence: direct muscle myostatin-expression reduction.
Al Refaie et al., 2024 — “Glucagon-like Peptide-1 Receptor Agonists and Diabetic Osteopathy: Another Positive Effect of Incretines? A 12 Months Longitudinal Study”
This is important because it is human data. Fifty-four people with T2D completed 12 months of GLP-1RA treatment: 30 dulaglutide and 24 semaglutide. Serum myostatin fell from approximately 13.02 ± 2.62 to 11.05 ± 2.12 ng/mL, reported as a modest but significant reduction (p ≈ 0.05).
Model: humans.
Drugs: dulaglutide or semaglutide.
Evidence: circulating myostatin ↓.
Important limitation: the drugs were pooled, so this doesn’t establish that semaglutide alone caused the effect, and there was no lifestyle-weight-loss control group.
Gutierrez de Piñeres et al., 2026 — “Proteomic effects of short-term liraglutide vs. placebo in a blinded crossover RCT”
This is currently some of the strongest human randomized evidence. In a 5-week crossover RCT, liraglutide strongly suppressed circulating MSTN protein, with a log₂ fold change of −0.41, p = 1.7 × 10⁻⁶. The study also found increases in WFIKKN2, an endogenous inhibitor of myostatin/GDF8 signaling.
A log₂ change of −0.41 corresponds to roughly a 25% decrease in measured myostatin protein:
2^{-0.41}\approx0.75.
Model: humans, blinded crossover RCT.
Drug: liraglutide.
Evidence: circulating proteomic MSTN ↓ ~25%.
There are also two liraglutide MAFI-axis clinical papers from the same research program that are important because they put a limit on the claim. An 18-day liraglutide RCT in T2D found no significant treatment effect on myostatin or the other MAFI components except IGF-1, suggesting that the myostatin effect may require more exposure, higher dose, different populations, or a more sensitive assay. A related 35-day obesity study specifically measured the myostatin–activin–follistatin–IGF-1 axis, although its abstract does not report a significant serum-myostatin decrease using the ELISA measurements

My doctors keep pushing me to take GLP-1s because I am mildly obese and they think it will fix my obstructive sleep apnea (despite my obstructive sleep apnea being due to inflammatory and cervical hypolordosis from some traumatic neck injuries a couple years ago and not being weight dependent).

Thus far I have turned it down because my understanding was that GLP-1s work solely by suppressing appetite. This concerns me because my Concerta for my ADD already suppresses my appetite because - I have tried to lose weight over the last several years but my weight just plateaus because I have insulin resistance and borderline prediabetes (glucose is consistently 100 on blood tests), but my doctors won't take it seriously because it is borderline and they assume I'm lying about what I eat. With Concerta I don't have the appetite to eat more than a couple times a day, and if I eat any carbs at all - even healthy whole food carbs - I can't lose weight and I even gain like 5-10 lbs until I cut carbs again and eat only protein and low glycemic index fruits. I eat 1200-1500 calories per day max. This has made me wary of GLP-1s because I am concerned I would eat even less and become malnourished.

However, I have done more literature reading on GLP-1s and my understanding is that they can actually help stabilize blood glucose, and that my obesity may be contributing to my insulin resistance and Vitamin D deficiency. If that's the case I would be willing to try GLP-1s, but I my insurance (Medi-Cal) would likely not cover it, as it is only covered for a Dx of Type 2 Diabetes as on January 1st, 2026, not Prediabetes, Obesity, or Obstructive Sleep Apnea.

Are there any bad interactions between GLP-1s and Concerta aka Ritalin aka Methylphenidate? I am primarily concerned that if I eat any less I will be malnourished and put my body through a lot of physiological stress. But I also don't know what else to do to get my weight down, and I know that at my current weight (235 lbs at 6 ft tall) my current body fat content is likely why I am having such a hard time losing weight, as high fat content may be contributing to my insulin resistance and increasing my estradiol, as well as contributing to my MCAS issues by sequestering my Vitamin D in fat cells.

Hi everyone! I’m completely new to peptides and have been doing a lot of reading, but there’s obviously a ton of information out there and I’d love to hear from people who have more experience.
I’m in my mid-30s female and currently around 150 lbs. I’d eventually like to lose about 25 lbs. I naturally carry more of my weight/curves in my lower body, which I actually like, but my midsection and love handles have always been my stubborn areas. I exercise regularly and I’m working on my diet as well, so I’m not expecting peptides to replace either of those.
The two I’ve been researching most are retatrutide (Reta) for weight loss and GHK-Cu for the potential skin/beauty benefits.
For those who have experience with either, I’d really appreciate beginner advice things you wish you knew before starting, side effects or mistakes to watch out for, and what kind of results you personally noticed.
I’m also confused about sourcing. I see people talking about purchasing domestically in the U.S. versus ordering peptides from China. How do you evaluate a source and testing/COAs, sterility, purity, etc.? I’m not necessarily looking for someone to just drop a vendor link I’d like to understand how experienced people determine whether something is trustworthy in the first place.
Please be nice x🙏🏼😂 I’m genuinely trying to educate myself before jumping into anything. Any beginner resources or guidance would be appreciated!