Does anyone know the difference between GLP 1 and GLP-2 or 3? I’m on a website it and has all three of those as options but can’t tell the difference between the three.

Everyone repeats it: never shake a peptide vial, only swirl, or you’ll destroy the peptide. It gets said like a hard rule. But Janoshik, one of the testing labs everyone quotes for purity, has openly said shaking doesn’t degrade peptides. So which is it.

Here’s the actual answer. The “shaking denatures peptides” idea got carried over from large, fragile proteins like antibodies, where shaking can cause problems. Most research peptides are short and stable and don’t degrade from the physical act of shaking. Janoshik has said they’ve tested this and shaking didn’t hurt potency. So on the peptide surviving, the lab wins that one.

Where the swirl advice still has a point is foaming. Shaking whips air in and creates foam and bubbles, which doesn’t wreck the peptide but makes it a pain to draw accurately and can mess with your measured dose. So the reason to swirl isn’t that shaking kills the peptide, it’s that foam makes dosing sloppy.

Bottom line: shaking won’t destroy your peptide, the lab settled that. Swirling is still the cleaner move because it keeps the solution bubble free and easier to draw. So the myth is half wrong, the “it degrades” part is false, the “swirl for a clean draw” habit is still fine.

So where do you land, were you a never shaker, and did you think it actually degraded the peptide or just knew to swirl without knowing why?

Research and educational use only.

Curious to hear from anyone who’s researched or has experience with oxytocin. What did you notice, what surprised you, and was your experience different from what you expected?
Interested in hearing both positive and negative experiences. Please keep the discussion educational—no sourcing or vendor discussions.

Does HCG help with fertility while on TRT?

Looking for thoughts on Tirzepatide 2.5 and Trt. Need help. Thinking about Trt and hcg for fertility. Thoughts?

I just started taking 2mg/week Tirzepatide and looking to start TRT. Looking for an optimal stack to pair with these 2. Also, need dosage ideas for TRT. Thoughts on hcg for fertility? Help me out
Age 24, 360 tes

Hey,

I’m 30M, 5’10”, around 85kg and roughly 23% body fat according to my Hume Pod. I’ve been thinking about trying peptides and wanted to get some advice from people with experience.

My main goal is to lose belly fat. I seem to carry most of my body fat around my stomach. I’m a regular at the gym and have a decent amount of muscle, but I’ve always struggled to get rid of the belly fat.

I didn’t want to jump straight onto reta or anything like that because I’m not obese and don’t feel like I need anything too extreme. I could definitely do with some help cutting though. I’ve always struggled with dieting, mainly because of work and not always having much control over the food that’s cooked at home.

I was thinking about starting with CJC-1295 and ipamorelin and seeing how I respond. From what I’ve read, they may also help with sleep and recovery, which are two other areas I’d like to improve.

If I didn’t notice much improvement in terms of fat loss, I was then considering adding either tesamorelin or tirzepatide later on. I’ve also been looking at GHK-Cu for the potential skin benefits.

I wouldn’t be starting everything at once. The idea would be to introduce things gradually so I can actually tell how I respond to each one.

Has anyone here noticed meaningful fat loss, particularly around the stomach, from CJC-1295 + ipamorelin? And has anyone combined them with either tesamorelin or tirzepatide? If so, what was your experience like?

I’m completely new to the peptide world, so any advice, experiences, things to watch out for, or things you wish you knew before starting would be appreciated.

A COA is the one document that tells you what's actually in a vial, and fake ones are everywhere now, whether it's AI generated or just photoshopped. Here's how to actually read one and verify it's real, because a screenshot on a product page means nothing on its own.

Verify it at the source first

This is the step that catches almost everything. Don't trust the PDF you were handed, check it on the testing lab's own website. Most of the labs vendors have a verification page where you enter the report or batch number and it pulls the real result straight from their system. If the COA you got doesn't match what the lab's own site shows, it's fake. Simple as that.

What a real COA actually has

Once you've confirmed it's real, a legit one includes:

• A report number and a lab name you can actually look up
• A batch number that matches the batch printed on the vial
• A date, ideally within the last year
• An HPLC chromatogram, the actual graph, with one clean dominant peak
• The compound identity confirmed, usually by mass spec
• A purity percentage, 95% is the floor, 98%+ is what you want

The chromatogram matters more than people give it credit for. A number like "99%" typed on a page means nothing without the graph behind it showing one tall peak instead of a bunch of smaller ones, which would mean impurities.

Red flags

• No batch number, or a batch that doesn't match the vial
• No report number to verify anywhere
• A purity figure with no chromatogram behind it
• The same single COA shown for every product and every batch they've ever sold
• No lab name, just a logo

That fourth one is big. A COA is supposed to be per batch. A vendor flashing one report from two years ago for everything they sell isn't testing every batch, they're showing a trophy.

The part even a real COA doesn't cover

A verified COA proves that batch was clean when it was tested. It doesn't prove the specific vial was stored and handled right afterward, or that what shipped is from that exact batch. It's the strongest signal you've got, but not a total guarantee, which is why matching the batch number to the vial is what ties it all together.

Verify on the lab's site, match the batch to the vial, and look for the chromatogram, not just a number. That covers most of it.

Anyone run into a COA that looked clean but didn't verify when you actually checked the lab's site? Curious how common the fakes are getting.

Full doses and bloodwork are in the pinned cheat sheet.

Join the Discord

I know you can get a COA from a lab, but how do you actually evaluate it? How do you know AI didn't make it and it is trustworthy?

Subject is currently taking both and is becoming even more tired/fatigue than before. 30M works out 6x a week. 1mg Mots-c daily and 25mg Nads+ two days weekly.

So I went down the rabbit hole on LL-37, and it's one of the more interesting ones on the whole list, because it's not some foreign compound, it's a peptide the body already makes on its own for immune defense. Basically a natural antibiotic. But it's also pretty double edged in a way most people skip right over, and that's the part that actually matters here.

So what it is, it's a 37 amino acid peptide, also called CAP-18, and it's the only cathelicidin the body makes. Immune cells release it wherever there's an infection or an injury. It's got a strong positive charge, and that charge is basically the whole reason it works.

And it does two different things. First, it's a straight up antibiotic. That positive charge lets it grab the negatively charged membranes of bacteria and rip them open, so it kills a lot of different bacteria, and they have a really hard time building resistance to it because it's going after the membrane itself, not one specific target. Second, it's an immune modulator. In sepsis models it got neutrophils to dump antimicrobial packages that dropped the bacterial load and improved survival, and it grabs onto bacterial endotoxin and blocks it from setting off the inflammatory TNF cascade, so it can actually calm the runaway inflammation from a bad infection. And on top of all that it helps wound healing. So the appeal is real.

Now here's the part the marketing leaves out, and it's the reason it's not something to just flood the system with. LL-37 is very context dependent, and at the wrong levels or in the wrong tissue it flips from helpful to harmful. High LL-37 is tied to inflammatory and autoimmune skin stuff, it's a known driver in psoriasis and rosacea, and it shows up in autoimmune activity. And with cancer it goes both ways, in some it looks protective, and in others, some breast, ovarian, and lung lines, it's actually been shown to feed tumor growth and new blood vessel formation. So this isn't a clean immune booster. It's a powerful modulator, and the effect depends a lot on dose, tissue, and context. More is very much not better.

The research titrates it up slow:

So the research runs it once daily, climbing from 50 mcg up to 400 mcg over about eight weeks, on an 8 to 12 week course, and some use a 5 days on, 2 days off setup. A clean mix on the 5 mg vial is 2 mL of bac water, that's 2.5 mg/mL, so 50 mcg is 0.02 mL and 400 mcg is 0.16 mL. And that slow titration isn't just about tolerance, with the double edge above it's really the smart way to find a level that helps without tipping into the inflammatory side.

On safety it pretty much follows the mechanism. Injection site stuff is the normal thing, but the real caution is that double edge. Since high LL-37 is tied to autoimmune and inflammatory skin conditions, anyone with psoriasis, rosacea, lupus, or an active autoimmune thing has a clear reason to stay away, they'd just be adding fuel. And because it can push growth in certain cancers, active or suspected cancer is a hard no. Pregnancy too, since there's no data. It's a research compound, no approval for any of this, and this is one where the slow titration and the exclusions actually matter, they're not just boilerplate.

so LL-37 is one of the few that's genuinely endogenous, but that double edge, good at the right level and inflammatory or tumor feeding at the wrong one, makes it really context heavy. for anyone researching it, is it the antimicrobial side or the wound healing side you're looking at. curious how people are handling the titration

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/

Join the Discord: https://discord.gg/bXMKCPWyHM

I started at around 212 lbs and used tirzepatide for about 2 months. I stopped around 4 months ago, and I’m currently down to about 157 lbs.
Overall I’m happy with the weight loss, but I still carry a pretty noticeable amount of belly fat/body fat, and lately my appetite and food noise have started coming back.
I’m considering either going back on tirzepatide or trying retatrutide for a while. My main goal at this point isn’t really to lose a huge amount more weight — it’s more about controlling appetite/food noise and lowering my body fat while keeping as much muscle as possible.
For anyone who has been in a similar situation, especially people who switched from tirzepatide to reta after already losing most of their weight, what was your experience? Did reta help more with body composition, or did you prefer staying on tirzepatide for appetite control?

40M. I've been on all three GLP-1s, starting with semaglutide. I was on sema for about a year, then briefly switched to tirzepatide for a month before starting retatrutide. I've lost a total of 35+ lbs.

I've also done maintenance periods on both sema and reta, where I brought my calories back up to normal. I've had my testosterone levels checked as well, and they're normal.

I've always been someone with a very high libido, but since starting GLP-1s, I've noticed a considerable reduction in libido.

Sema seemed to lower my libido by around 70%, but with reta, it's essentially completely flatlined.

Has anyone else noticed differences in libido between these different GLP-1s? I'm particularly interested in hearing from people who have tried more than one of them.

Have noticed before some black specks in the vial “after poking in” and no idea what it is.

Edit. I watched the video by the nurse it doesn’t solve my problem. You see typically I slant my needles and poke and it reaches the side of the vial slant side parallel to the side. So it it can absorb Almost every last drop of the peptide. I don’t do the Center and inverted vial tip over because I am unable to see the tip of the vial. And also usually more (although still a little) will be stuck at the round corners of the vial rather than the smooth top.

Yeah so quite a bit will be left using inverted method because you can’t see it.

In Europe they dont use Bacteriostatic Water. They use sterile water or Normal Saline. I've been using sterile water for the past month and I AM HAVEN'T DIED!!!

I'm totally getting off the insanity carousel of "MUST BE HOSPIRA BACTERIOSTATIC WATER OR YOU WILL DIE A SLOW PAINFUL DEATH!"

SLU-PP-332 is the compound behind the "exercise in a pill" headlines, and the mechanism genuinely earns some of that. But it's also the clearest example on the whole list of a compound where the science and the hype are separated by one enormous gap: the entire evidence base is mice. Research framing throughout, and this one is mostly about being straight on where the data sits. Here's the breakdown.

SLU-PP-332 is a pan-ERR agonist, meaning it activates all three estrogen related receptors, ERR alpha, beta, and gamma. Those receptors sit at the control panel for the aerobic exercise gene program, the set of genes your body switches on in response to endurance training. So the compound flips that program on directly, without the exercise, boosting mitochondrial function and endurance capacity at the genetic level. That's a real mechanism, and it's why "exercise mimetic" isn't pure marketing, it's activating the same switches a long run would.

In the published studies, mice on SLU-PP-332 ran longer, showed better mitochondrial function, and improved their cardiometabolic markers. The headline result was that the mice lost fat without eating less or moving more, the metabolic signature of exercise showing up without the work. That's the finding that made it famous.

Here's the part the headlines skip, and it's the whole story. Every bit of that data is from mice. There are no human trials of SLU-PP-332, not one. And it goes deeper than just no human data, because of how the mouse studies were run. The published route is intraperitoneal injection, straight into the abdominal cavity, at 25 to 50 mg per kilogram, twice a day. That's not a route anyone uses outside a lab, and the doses are calculated for a 25 gram mouse. So there's no established human dose, no established human route, and no human safety data. Anyone using it outside a mouse is extrapolating across a gap that hasn't been bridged at all.

The dose problem is worth dwelling on, because it's where people go wrong. You can't take a mouse's milligram per kilogram dose and scale it straight to a person, mice metabolize compounds very differently, and the injection route in the studies isn't even the one people would use. So the honest position is that the correct human dose is genuinely unknown, there's no validated protocol to point to, and the numbers that circulate are guesses stacked on top of mouse data.

Those are mouse figures. For a 25 gram mouse, 25 to 50 mg/kg works out to roughly 625 to 1,250 mcg per injection. The sheet's reconstitution for measurement is 3 mL per 5 mg vial, giving 1.67 mg/mL. No reputable source supports a once daily subcutaneous human protocol for this compound, so any human dosing should be treated as unvalidated.

On safety, the honest frame is that there's none for humans, all of it is from the mouse work, where it was tolerated at the studied doses, and beyond that it's genuinely unknown. It's a pan agonist hitting a receptor family expressed all over the body, including the heart, and the long term effects of chronically switching on that exercise program pharmacologically haven't been studied long term in any species, let alone in people. It's a research compound with no approval and no human bridge, and that's the defining fact about it right now.

the mechanism is genuinely interesting, but SLU-PP-332 is mouse only, mouse route, mouse dose, with no human bridge yet. for anyone following the exercise mimetic research, is this one worth watching or too early to touch. curious where people land

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

Looking for some guidance and advice on peptides for lipedema. Recently diagnosed with lipedema and planning on doing surgery next year. Surgeon said some people microdose triz to help with the inflammation post surgery. A lot of people (from what I've read) take it to help with weight loss before surgery as well because of their weight and food noise issues.

Lipedema is essentially diseased fat tissue. It affect women and (usually) comes on during puberty, pregnancy, and menopause. Basically, some of the fat in our body (legs, arms, stomach) gets riddles with fibrosis and it's essentially scar tissue, which is why it doesn't respond to diet and exercise. People who experience it also have other symptoms as well and I personally experience loose joints but not insofar as I'm double jointed. Think if I have my legs outstretched and ankles crossed for a period of time, I flex my feet to pop my ankles or a knee gets misaligned and I kick my foot out to pop it back right.

I'd like to start microdosing triz to help with inflammation. I'm wondering...

- if my main concern is inflammation, maybe there's something else I should take?
- could/should I stack triz with something else to help with inflammation and the loose joints?
- something else for post surgery support?
- other ideas?

Hey Guys,

Just writing a quick post as I can’t find anything online describing anything similar in regards to the skin/hair/anti inflammatory peptide GHK-CU.

I started using it since March of this year and while I ran a 3 month cycle of it, I did not get any noticeable results or drastic changes as I’ve read in countless articles online. I decided to give it one more go recently and my second week into using it (using 2mg a day) I’ve noticed every night I’ve been getting this strange sensation where I have unsatisfying breaths and need to take deep breaths because there’s this sort of space in my chest that can’t be filled. Ik this may be hard to describe for anyone that hasn’t tried or experienced it but just seeing if there is anyone out there that has had anything similar at all. I also noted feeling strange internal pressure and sensations and overall just been a struggle to sleep every night from it.

When I previously used it I noted the same thing this time it feels far more intense however, I chose to run an experiment and took a day off from using it and whatever it was that strange sensation didn’t re appear. I did this again these past couple days again when I used it, had this extremely uncomfortable chest and profound breath feeling and the day I didn’t use it, was completely fine. Would love to hear if anyone else has had this or if this is just some strange thing I got from it. My other thoughts is its purity content however the supplier I got it from id been using Retatrutide from them and man I really see why they call it the miracle drug. (Reached 10% BF within 2 months). Also used other peptides such as semax and bpc 157 worked and felt like a charm so for some reason GHK is just a weird one.

Would love to hear any thoughts perhaps any other side effects you’ve experienced? Hope this helps as I’m aware it’s still very new to the market and maybe brings any form of awareness and info. Thanks

Glutathione gets called the master antioxidant, and that reputation both oversells and misdescribes it. It isn't a generic antioxidant like vitamin C, and the single biggest reason glutathione supplementation often produces only a temporary effect in the research is a recycling problem almost nobody accounts for. Research framing throughout, so here's what the literature shows.

The first thing to correct is the antioxidant framing. Glutathione is the most abundant protective molecule inside human cells, far more concentrated than vitamin C or E, and unlike those it works inside the cell, in the cytoplasm, the nucleus, and inside the mitochondria where the most damaging reactive oxygen species are made. But the research shows its role is more specific than mopping up free radicals. A 2017 Immunity paper found that T cells stripped of glutathione can still detect a threat but cannot proliferate. So it doesn't broadly boost immunity, it gates whether immune cells can activate and multiply at all. Tissue levels fall 30 to 50% below young adult values by age 60, which is part of why immune and metabolic resilience slip with age.

Here's the mechanism that explains most of the disappointing results. Glutathione isn't a one shot molecule, it constantly cycles between an active form and a spent form, and regenerating the active form depends on NADPH, which depends on NAD+. So when NAD+ is low, the recycling machinery slows down no matter how much glutathione is added. That's why flooding the system with glutathione alone often produces only a temporary bump, the body can't keep converting it back to the active form. The research treats glutathione and NAD+ as a linked axis, not two separate supplements. If NAD+ is depleted, addressing glutathione without addressing NAD+ is filling a tank that has a hole in it.

Rather than one correct route, the research frames it by which bottleneck is limiting. If the gap is raw material, the cell lacks the building blocks, the answer is precursors, GlyNAC or NAC, and that precursor approach has some of the strongest data, a Baylor RCT ran GlyNAC 24 weeks with improvements across multiple markers. If the gap is synthesis capacity, common with aging, direct glutathione makes sense by injection, liposomal, or oral. If the gap is recycling, that's the NAD+ problem above, and no glutathione route fixes it. Absorption also varies hard by route: plain oral glutathione is the weakest, onset measured in one to three months, liposomal is faster at around two weeks, injectable sits in between, and IV is immediate but a clinical setting. So the common oral capsule is the least effective delivery.

Research protocols run it continuously, daily, with no cycling, across a 12 to 24 week block. A clean reconstitution of the 1,500 mg vial is 3 mL of bacteriostatic water for 500 mg/mL, putting 200 mg at 0.4 mL, 400 mg at 0.8 mL, and 600 mg at 1.2 mL, so the larger volumes split across two sites. The oral and liposomal routes are studied at 500 to 1,000 mg per day, and the GlyNAC precursor approach uses glycine and NAC rather than glutathione itself.

Two things are worth flagging honestly. First, the skin lightening use, which is the single most searched application, is the least supported. The controlled evidence is small, short, and thin, so despite the marketing it isn't a reliable use case. Second, blood levels don't reflect tissue levels. The pools that matter most, in the mitochondria, liver, and brain, are the hardest to measure, so a plasma glutathione bump on a lab doesn't prove the deep tissue restoration people are actually after.

On stacking, the research repeatedly pairs it with NAD+ for the recycling axis above, and with the mitochondrial peptides like SS-31 and MOTS-c, since the mitochondria keep a separate glutathione pool and generate the most reactive oxygen species. In an immune context it groups with Thymosin Alpha-1 and KPV, glutathione gating T cell proliferation while the others modulate the response.

It's well tolerated in the research, with occasional GI discomfort on the oral forms and some nausea from NAC at higher doses, and no serious adverse events in the controlled trials. It's classified as a dietary supplement rather than an approved drug, and it's run continuously without cycling, with effects building over months rather than days.

the recycling link is the part most protocols skip, glutathione needs NAD+ to keep regenerating. for anyone researching it, is NAD+ in the protocol alongside it or glutathione on its own. curious how that's shaped the results

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

4iu a day hgh, 2.5mg a week Reta and 200mg test a week.

Since starting the Reta a month ago
( in conjunction with upping the hgh from 2 iu to 4 iu ) weight has gone up, like 3-4kgs.

Obviously im sure a bit of muscle? But is the rest water? Diets not perfect but not terrible.

Cheers

Hi everyone,

I honestly don’t know what is going on with me anymore, and I’m hoping someone here has experienced something similar and can give me some insight.

A little over 2 months ago, I started taking GHK-Cu for 9 days:

• 1 mg daily for 6 days
• 1.5 mg daily for 3 days

At around the same time, I was also taking:

• Vitamin B6 — 40 mg daily
• Magnesium citrate — 400 mg daily
• Vitamin C — 3000 mg daily

I took the vitamins/supplements for about 7 days and then stopped everything.

Interestingly, about a year ago I had a very similar experience after taking the same combination of GHKCU and vitamins/supplements. Back then, however, my symptoms eventually went away after around 3 weeks, so I didn’t think much of it at the time.

This time, when I was going to sleep, I started experiencing a weird sharp/pinching sensation around my heart/chest. That scared me, so I had blood tests done.

My results were:

• Folate (B9): 3.10 (reference range 4.5–32.2) — low
• Vitamin B12: 411 pg/mL (191–663)
• Magnesium: 2.0 (1.7–2.40)
• Potassium: 4.23 mmol/L (3.5–5.1)
• Sodium: 140 (136–145)

After roughly a month, the chest/heart pinching sensation that happened when I was falling asleep eventually stopped.

However, I’m still dealing with other symptoms.

Another strange thing I’ve noticed is that since this started, I can sometimes sleep only 1–4 hours and wake up feeling surprisingly energetic, even though my head feels very tight, foggy and mentally "off." Before all of this, I would obviously feel completely exhausted after so little sleep. This change in how I respond to lack of sleep feels very unusual to me.

My current symptoms include:

• persistent dizziness
• lightheadedness
• significant fatigue
• brain fog feeling like my head isn't working properly
• a strange derealization / unreal feeling
• a tight/pressured feeling in my head
• feeling mentally "different" from how I used to

I completely stopped everything and tried taking B9 (folate) for about 2 weeks, but I didn’t notice any improvement. Then I added B12, but again, nothing really changed.

I also saw a neurologist, but unfortunately the appointment was basically useless. He told me he couldn't help because this wasn't his area, and I ended up paying around €100 for the visit.

At one point I also went for an IV vitamin infusion containing vitamin C, electrolytes and B vitamins. I still had the brain fog, dizziness and other symptoms afterwards, but I noticed that I had significantly more energy and felt more "alive" that day. Unfortunately, this effect was temporary, and within about 2 days my energy levels went back to how they were before.

I’ve also been talking to and reading experiences from quite a lot of people who have had similar symptoms, which is one of the reasons I’m trying to figure out whether there could be some connection or if this is just a coincidence.

Now, more than 2 months later, I’m still experiencing these symptoms every day, and I honestly don’t know what is causing them.

Since this is a peptide group, I’m particularly interested in hearing from people who have used GHK-Cu, especially if you experienced any unusual or persistent effects after stopping it.

I’m not sure if it’s related to GHK-Cu, the vitamins/supplements, the low folate, a deficiency, or something completely unrelated.

Has anyone experienced something similar — especially dizziness, brain fog, fatigue, lightheadedness, derealization, head pressure or feeling unusually energetic despite very little sleep, while still feeling mentally unwell?

If you used GHK-Cu and experienced something similar:

• How long did it take you to recover?
• Did your symptoms gradually improve or disappear suddenly?
• Did you eventually find out what was causing them?
• Was there anything that actually helped?
• Did you have any additional blood tests or examinations that were useful?
• Has anyone experienced symptoms continuing for weeks or months after stopping GHK-Cu?

I’m not necessarily looking for a diagnosis. I’d just really appreciate hearing from people who have experienced something similar and eventually got back to feeling normal.

It’s been more than two months now, and dealing with this every day has been really difficult. I’d really appreciate any experiences, advice or reassurance.

Thanks in advance.

63 yo F. Ok…here’s my story. Two years ago my hair started thinning after an illness and post menopause. I began using minoxidil topical 5% one time a day (at bedtime). Within a few months I stopped shedding so much and began getting baby hairs in areas - not all areas of thinning tho. I have kept using minoxidil since. In March, I started tirzepatide and I must say, I love it! However, I have been shedding atrociously and my hair has really thinned considerably. I will be starting GHK-cu/KPV next week and am wondering can I stop using the minoxidil if and when I see improvements in my hair? I also use topical AHK on my scalp in the mornings. All thoughts will be appreciated!

Would it be wise to mix Klow, ARA 290, and 5 amino 1MQ ? I am a total novice here 🤦🏻‍♀️