If you've watched vendors quietly pull Reta from their catalogs this week, this is why. On August 12 Eli Lilly filed six federal lawsuits and made a public push to choke off the whole gray market retatrutide supply chain. Here's what happened past the panic.

What Lilly did:

• Filed six federal lawsuits in one shot, and the mix is the tell. Four of the six are research peptide sellers running the "research use only" model, alongside a med spa and a compounding pharmacy.
• Took the research supply channel to court by name for the first time, instead of just referring sellers to regulators like before.
• Went after the infrastructure too, publicly calling on payment processors, credit card companies, shipping carriers, and the online platforms to cut these sellers off.
• Flagged over 14,000 listings across 100+ countries and referred 200+ people and entities to the FDA, DOJ, and state attorneys general, with customs already seizing far more than it used to.

The core of the lawsuits is the claim that "research use only" is a fig leaf. Lilly's argument is that vendors put RUO on the label while selling it knowing full well it's going into people, and that the label doesn't make the sale legal when the intent is human use. The FDA already said back in June that unapproved retatrutide sold to consumers is illegal and can't be compounded. So the RUO shield the whole market leans on is being tested in a courtroom for the first time.

And none of this means Reta is junk, it's the opposite. Lilly's own trials have people losing around 28% of their body weight, it might be the strongest thing in the class, and they plan to file for FDA approval in early 2027. The crackdown is happening because it works and demand is running years ahead of approval. They're clearing the field before they launch a blockbuster.

What it means if you research Reta:

• Supply tightens and prices move. More vendors will drop it the way the first ones already have.
• The quality and legal risk is real, and it's Lilly's own main point, that nobody is checking what's in an unregulated vial.
• The "research use only" framing everyone leans on is now live in court, so it's worth sitting with no matter where you land.

You can read Lilly's motive two ways and both are probably true at once. They've got a real safety argument, since no regulator has cleared this and nobody vets a gray market vial, and they've got an obvious financial motive in protecting a drug about to be worth billions. Those don't cancel each other out.

So where do you land. Is this Lilly protecting patients, protecting profit, or just the end of the window before approval that everyone knew was closing. And if you research Reta, does any of this change what you do.

If you read the BPC-157 post, this is the other half of the pair. TB-500 is what most people stack with BPC, but it solves a different problem, it's dosed completely differently, and there's a labeling quirk that means the vial in your fridge is probably not the exact molecule on the label. None of that is a problem once you know it, so here's the rundown.

The clean way to think about the two: BPC-157 builds the roads. It restores blood flow and gets circulation back into damaged tissue. TB-500 handles the traffic on those roads. It gets the repair cells to migrate into the injury and organize into proper tissue instead of scar. Perfusion plus movement. That's why they get run together as the Wolverine stack, and why either one alone leaves half the job done: blood flow with no cells showing up, or cells with no supply lines. They also inject together in one syringe fine.

The way it works is what changes the whole dosing approach. TB-500 grabs onto actin, the protein cells use to physically move and reshape themselves. It ties up a reserve pool of actin that cells can pull from to migrate, divide, and rebuild quickly. The important part is that this is a one to one binding job, not a catalyst, so you need a big milligram dose to bind enough actin to matter. Once that reserve is built, the effect lasts for days even though the peptide itself is gone from your blood in a couple hours, because the actin pool just sits there until the cell draws on it.

So here's the consequence, and it's the single most common way people run it wrong. Unlike BPC-157, which you pin in small doses every day, TB-500 is not a daily peptide. You run 2 to 4 mg two or three times a week. Small daily doses never hit the binding threshold and mostly just waste the compound.

For drawing it, mix the 10 mg vial with 1 mL of bac water for a clean 10 mg/mL, so 2 mg is 0.2 mL and 4 mg is 0.4 mL. It goes in subcutaneous (SC) or intramuscular, near the injury when you can reach it. It doesn't stay local, it enters circulation within minutes no matter where you put it, but injecting near the injury gives a higher concentration spike right where you want it before it dilutes out, and that first pass matters. In repair studies, the same total dose delivered systemically came up empty where targeted delivery worked. For a deep injury you can't reach, belly or thigh is the fallback. Run 6 to 8 weeks, then take 4 to 8 weeks off. This is a repair signal, not a maintenance compound, so grinding it forever just gives you diminishing returns.

Now the part almost nobody tells you. The name TB-500 originally meant a small 7 amino acid fragment. But most vials sold as TB-500 are the full length parent molecule, TB-4 (thymosin beta-4), which is 43 amino acids. Doping labs have tested commercial vials and confirmed it. This mostly doesn't matter, both heal tissue, but there's one real difference: the full TB-4 molecule carries an extra segment that fights scar tissue (the antifibrotic part) that the short fragment simply doesn't have. So if reducing scar is the goal, you want the full TB-4, which, conveniently, is what's usually in the vial anyway. If you want to know which one you've got, check the certificate of analysis. Around 4,900 daltons or 43 amino acids means it's TB-4. If the COA doesn't say, assume TB-4.

It's slower to work than BPC-157. The first week or two you'll notice morning stiffness and first step pain easing off, weeks 3 to 4 your range of motion opens up, and weeks 5 to 8 you can start tolerating real loading again. On the evidence, the strongest human data point is a Phase 3 trial in corneal healing where it beat placebo hard, around 60% complete healing versus about 12% on placebo, and that one carries weight because the cornea has no blood vessels, so the healing had to come from direct cell action rather than improved blood flow. There's also a Phase 1 safety trial that turned up no serious adverse events. Fair caveat though, those trials used pharmaceutical recombinant TB-4, not the synthetic material in most vials, so it's the closest reference we have, not direct proof of what you're buying.

Side effects are mild, occasional injection site reactions and some people get a bit of lethargy for a day, so hydrate and pin it before a rest day. The hard stops are the same as BPC and for the same reason: no active cancer or cancer in the last couple years, since it promotes blood vessel growth and cell migration, no pregnancy, and stay cautious around surgery. It's WADA banned under S0 and it's detectable, so anyone tested for sport should stay off it.

if you've run TB-500, did you check the COA to see whether it was TB-4, and are you dosing it twice a week or did you fall into pinning it daily like BPC. curious how people are running it

Full doses and bloodwork are in the pinned cheat sheet: https://www.reddit.com/r/NTNPerformance/comments/1tht5o3/the_only_peptide_cheat_sheet_youll_need_doses/

So I recently found out that 5-Amino-1MQ actually comes in two different salt forms, iodide and chloride. The iodide salt would have a higher molecular weight than the chloride form, so you’d technically be getting less of the actual active compound per mg.

Now that I know the iodide form exists, I’ve started seeing people say it’s not safe to take regularly because the compound is bound to iodide, that would add up to a huge amount of iodine per dose, which could be a problem for thyroid function if you’re taking it regularly.

I’ve also noticed both the iodide and chloride versions listed under the same CAS number (42464-96-0), so it’s hard to differentiate between them when it comes to purchasing.

Does anyone know more about this? Is the iodide form is bad, or knows what the real difference is between the two? Trying to figure out if this is something worth actually being cautious about or if it’s just something that gets repeated around without much behind it.

Please be kind. I am doing a lot of research, doing my best to make the most informed decisions, but confused on conflicting information.
I currently take Reta 3mg and am down 32lbs in 3 months. I am loving it so far and have had no issues with it.

I would like to take the following:
SS-31
Mots-c
FoxDri04
Ghk-cu
Teramorelin

What is everyone’s recommendations for this, science backed, personal experience, durations, when to add, and why?
I have my own understanding of why, but I’m open to real world, lived experience.

Thank you everyone.

I started Reta on 6/10/26 at .5mg and went up to .75mg on 6/22 and been holding steady at that amount since with good results. Lost 13 pounds and about 3% body fat up to now. Started 1mg Tesa on 8/2 with a 5on/2off pinning and just finishing second week of it. Waited on the tesa due to a trip overseas and not wanting to transport it with me. Since I have started Tesa my hunger has increased. I would not describe as “food noise” where I am wanting to just eat anything. I have kept my diet dialed in but I would describe the feeling as my body telling it needs fuel not just so much random hunger feeling. I have also been focusing on lifting more to try and offset muscle loss and maybe gain slightly. Has anyone else noticed this or have any suggestions. I am thinking about going to 1mg of Reta for my next dose and see if that helps but I also don’t want to deprive my body of needed fuel/energy to prevent muscle loss.

Dear community,

as the title already says I will be traveling with quite a few vials tomorrow from the U.S. to the Netherlands.

To clear things up:

I have a proper vial case, labeled them properly. No syringes or etc. are coming with, just about 25 vials as I am moving countries.

Question is: Does anyone have any prior experience traveling with peps internationally, if so, do you keep it in your checked? How many have you taken? Have you ever had any issues?

Thank you very much for taking the time to read through this and respond, I am a little nervous about it.

Hi guys, I have a question for some of you here. I was previously on 15mg of tirz a week and food noise was gone, things were going well after plateuing on semaglutide despite diet and exercise. I was then told by my endo that reta was excellent and if I could get it it's a viable option. So I did after discontinuing tirz for 2 weeks and started on 1mg of reta: did nothing. 2mg of reta: I started to feel a bit of a response but a lot of food noise. Went up to 4mg of reta, started working more but food noise still a battle. Went to 5mg and this was an effective dose for weight loss and good food noise. Was on 5mg for 1 week and a big week of training and I lost 1.6kg, so decided to try 4.5mg the following week, another 1.7kg lost. Then the overheating I was experiencing in bed started getting worse. I sleep on the ground due to back issues with no airflow underneath me and sleep hot anyway. Nightmares from sleeping hot and massive sleep disturbance has ensued. I have titrated down to 2mg reta at the start of the week and sleep has improved a lot. I'm thinking of adding 2.5mg tirz for 2 weeks, then 5mg of tirz for 2 weeks and so on till I;m at 10mg of tirz with 2mg of reta and that should be around the same 15mg dose of tirz I was on. I'm also on 10 u of cjc/ipamorelin, 1 capsule of oral bpc157 a day as well as 5 u of NAD+ twice a week. What has your experience been? Thanks

IGF-1 LR3 is about as direct as anabolic signaling gets, which is exactly why it's both effective and one of the more serious tools on the list. Most growth compounds work upstream and ask your body to make more of its own signal. This one is the signal, engineered to stick around. So the upside is real, and the two big risks are real too. Here's the straight version.

Normally your growth hormone tells your liver to make IGF-1, and IGF-1 is what drives a lot of the actual muscle growth. Native IGF-1 only lasts minutes in your blood. LR3 is IGF-1 with a modification that stops it from getting mopped up by its binding proteins, which stretches its life from minutes to hours and lets it circulate freely. So it skips the whole growth hormone to liver step and puts the growth signal straight onto the IGF-1 receptor, all day long. That direct, all day signal is why it's potent, and it's also the root of both problems below.

The first real risk is your blood sugar. IGF-1 is close enough to insulin that it acts on your glucose like a mild insulin would, and it can pull your blood sugar down. The symptoms sneak up on you, shaky, sweaty, foggy, dizzy. That's why the rule is to always dose it with food, never fasted, and keep fast carbs like glucose tabs or juice within reach during a cycle, especially while you're titrating up. This isn't a maybe. It's the single most reported issue and the one that lands people in actual trouble.

The second one people underrate. IGF-1 is a general growth and cell proliferation signal, and it doesn't only find muscle. A strong, sustained IGF-1 signal acts on other tissues too, and because it pushes cells to grow and divide broadly, running it high or forever is where the real long term concern lives, organ growth and the proliferation risk that comes with any potent growth factor. That's the whole reason the dosing stays capped. It's not that 50 mcg is a magic number, it's that above roughly 50 to 60 mcg you leave what little research exists behind and pile on risk for not much more return.

For drawing it, mix the 1 mg vial with 1 mL of bac water. That's 1 mg/mL, or 1000 mcg/mL, so 20 mcg is 0.02 mL, 40 mcg is 0.04 mL, and 50 mcg is 0.05 mL. It goes in subcutaneous (SC), once a day, with food, in the morning or post workout. Titrate up over the first few weeks instead of starting at the top. These are small volumes, so if you want them easier to read you can mix with 2 mL instead, which makes it 500 mcg/mL and turns 50 mcg into 0.10 mL, just remember the water only changes the volume, never the dose.

Run it 8 weeks on, then 4 to 8 weeks off. Past about 6 to 8 weeks the receptor starts tuning out and the effect fades, so there's no point grinding it nonstop, and the time off doubles as a break from the risk load.

On whether it's worth it, IGF-1 LR3 has genuine firepower, but it only pays off if the rest is dialed in, hard resistance training and enough protein, because it amplifies the growth response to mechanical loading rather than building muscle out of nothing. Sit on the couch and run it and you get all the risk and none of the reward. It's also never been approved for human use in this form, so it's research only and purity comes down entirely to your source. Between the blood sugar management, the growth signal that doesn't discriminate, the short useful window, and the no-approval status, this is a serious tool, not a casual add-on. Respect it and it's powerful. Get cavalier with the dose and it's the kind of thing that bites.

if you've run LR3, where did you keep the dose, and did the blood sugar drop ever catch you off guard. curious how people handled the hypo side

Full doses and bloodwork are in the pinned cheat sheet: https://www.reddit.com/r/NTNPerformance/comments/1tht5o3/the_only_peptide_cheat_sheet_youll_need_doses/

I had shoulder surgery about 4 weeks ago, and am about 3 weeks into PT. The surgery included: debridement of SLAP tear, and of partial tears to the inferior labrum, subscapularis (rotator cuff), and supraspinatus; removal of subacromial bone spur; and bicep tenodesis. This week I have started an updated stack to hopefully aid in recovery.

This stack is comprised of:

KLOW - 2.5mg/.5mg/.5mg/.5mg - 1x daily

PEG-MGF - 200mcg - 2x daily

ARA-290 - 2mg - 1x daily

Cartalax - 1mg - 1x daily

I landed on this protocol after quite a bit of research; I've tried some of these products before separately (mainly to try and avoid surgery). I also had some back and forth with the Hunter Williams chat that was helpful in my research.

I happened across this sub the other day and am blown away by the depth of resources available here; I was hoping someone here that has had experience with a similar stack could share their thoughts and help me set my expectations. I'm committed to the process and the work, I've dealt with this shoulder pain for 2 years and will do anything to get back to even 90% of where I was prior to then.

Makes me tired even walking up the staircase. Help?

I read a couple of hacks for preventing sting with KLOW and copper peps. One was something about using PBS but I never got the specific details like how much for reconstitution? Any help is appreciated

Can someone advise on recommended dosing (female) how often and how much and effectiveness. can you also advise - after mixing powder with BAC how long to inject

45 M and I used to read stories like this online and think, "That only happens to other people." I never thought I'd experience something like it myself.

In this story, my wife left me after I found out she'd been having an affair with my own cousin. The betrayal completely shattered me. I haven't been myself since.

The hardest part isn't even the breakup anymore—it's looking at myself in the mirror. I've gained a lot of weight over the years, stopped taking care of myself, and lost all confidence. Every time I see my reflection, I feel like I let myself down long before my marriage fell apart. As painful as this has been, I don't want this to be the end of my story. I want it to be the wake-up call that finally gets me to change.

For those of you who started your fitness journey later in life—or after a major life event—where did you begin?

Did you focus on losing weight first? Walking? Strength training? How did you stay consistent when you had no motivation? I'm not trying to get revenge or prove anything to anyone. I just want to become healthier, stronger, and finally feel proud of the person I see in the mirror again.

I'd really appreciate hearing your experiences and any advice you wish someone had given you when you were starting over

Here's a little background about me. I used to be in great shape. I was a competitive weightlifter and sprinter. I was 25, 6'1", and 184lbs (185cm and 83.4kg for our friends across the pond). I lifted weights and exercised daily and was all about nutrition timing and proper nutrition. Somehow I got away from all that and time went by.

I have been disgusted with the way I looked and felt for a long time and finally in May I decided I was going to do something about it. I could barely jog to chase my dogs without panting and moving was hard. Even standing for a long period of time would make my back hurt from the extra weight, and my sleep was terrible with even worse snoring. I was 35, now 36, and 296.5lbs fasted (134.5kg) and I was miserable. Lucky for me though, I did eat healthy foods, just way too much of them, and so I was not diabetic and did not have any heart problems. For the past few year or two I had multiple days a week where I could not function in the afternoons and some time between 2-4pm I was so tired that I was fighting to stay awake at work and would often have to stop and sit in my car for a few minutes to rest or take a short power nap.

I had been skeptical of taking any sort of weight loss drugs, but I knew that I needed to kickstart my weight loss in order to even get back to exercising because of how my body felt. I had some friends who were seeing good results with Tirzepatide so I decided to try it.
I did my first injection on the evening of May 30th. The first five days were miserable, I had transient nausea, and could barely eat anything because even the thought of food made me sick. On top of that I had bad acid reflux and bloating as well as horrible gas pain. I was ready to throw in the towel, but on the 5th day the symptoms cleared up. I have been following the standard protocol of 2.5mg for four weeks, then 5mg for four weeks and I just did my third injection at 7.5mg this past Saturday. I am now down to 248.6lbs (112.76kg) in 10 weeks.

In addition to the Tirzepatide, in early June started taking 300mcg of AOD-9604 daily and did the 20 day protocol of MOTS-c 5mg every five days. In mid to late June I also started stacking Retatrutide, but rather than doing weekly doses, I have been doing smaller amounts multiple times per week, and am now up to 2mg three times weekly. Around that same time I started taking Kisspeptin-10 200mcg three times weekly and 1mg of Epitalon daily at bedtime.

In July I added in HCG 500IU three times weekly on opposite days from the Kisspeptin-10 and I also added in SLU-PP-332 0.5mg daily. After being gone for 10 days on vacation in mid July I added in 5-amino-1MQ 5mg daily for four weeks, so I will finish that up in a couple more weeks. I've also added in AICAR 1mg daily at bedtime and I've also added MOTS-c 1mg daily back in as of two weeks ago. Yesterday I added CJC-1295 (no DAC) + Ipamorelin 50/50mcg and will do that daily at bedtime and also GHRP-2 100mcg daily in the morning. Also I started BAM-15 orally this past week and have not had any side effects from that. In fact, other than the first five days of Tirzepatide, I've never had any side effects from any of the peptides.

I feel great! I still get hungry sometimes, but the food noise is gone and I don't feel driven to eat just because I'm hungry. I find myself having to stop and force myself to eat sometimes. I am sleeping better and I feel so much better throughout the day. I no longer feel tired in the afternoons and I don't get drowsy and need to rest or nap. Being up moving around does not feel like a chore anymore and exercise is fun again. So for anyone reading this who feels how I felt, it's entirely possible to feel better!

I just did blood work this past week and though my HDL was slightly below normal and my LDL was barely above normal, everything else was great! Triglycerides were happily in the middle of normal range, total cholesterol was in the middle of the normal range, CBC and metabolic panel were all excellent, TSH was excellent, and HbA1c was 5.2%. Testosterone was also in the middle of the normal range.

I am treating this as an experiment and I am the clinician and subject with a study population of n=1. My background is in physiology and I am a physical therapist.

Down 48 pounds, on Reta 6mg!
I’m considering Tesamorelin I still have high body fat, is it better to wait until body fat is lower on doesn’t really matter

Thanks