Peptide Codes Forum

So I've been sitting on this write-up for a while now because I wanted to have enough data points before sharing, and honestly I feel like the hexarelin conversation in most spaces is SO surface level. Everyone talks about it like it's just "GH secretagogue, use it, profit" and that's literally the beginning and end of the discussion. So I wanted to put together something more comprehensive because that's what I would have wanted to find when I was researching this.

Quick background on me - I've been deep in the biohacking world for about 4 years now. Started with basic nootropics and sleep optimization (huge shoutout to the Huberman content on sleep architecture, literally changed how I approach recovery), moved into peptides about 18 months ago. I've run BPC-157, TB-500, a short run of ipamorelin/CJC-1295 no-dac, and a few other things. So I'm not coming into hexarelin completely blind, I had some reference points for what secretagogues feel like.

Okay so why hexarelin specifically. I was really interested in it for the combo of effects - the GH pulse it generates is genuinely significant compared to something like ipamorelin which is more gentle, and I kept hearing from various corners of the community (shoutout to the Nootopia guys and some of the older threads on Longecity that I fell down a rabbit hole on) that the cardioprotective angle was underexplored. There's some interesting receptor binding happening with hexarelin that goes beyond the ghrelin pathway stuff, specifically around the CD36 receptor and cardiac tissue. I listened to a pretty dense episode touching on this - I think it was actually a Shawn Wells interview or maybe it was the Peptide Hour podcast, I have like 400 episodes downloaded and they blur together honestly.

My protocol for the first 4 weeks was 100mcg subcutaneous, once daily, fasted in the morning about 30-45 minutes before I broke my fast. I was doing a 16:8 window at the time. Reconstituted with bac water, kept everything refrigerated, sourcing is what it is and I won't go into that here.

Week 1 and 2 observations:

The hunger thing hit me immediately and I want to spend time on this because it genuinely caught me off guard even though I thought I was prepared. Hexarelin is working on the ghrelin receptor right, so of course there's a hunger component, but I had read it was "less pronounced" than GHRP-6 which is notorious for the face-stuffing hunger response. I don't know who wrote that because my hunger was INTENSE in the first two weeks. Not unbearable but enough that I had to rethink my fasting window because I was becoming genuinely miserable around hour 12. I ended up compressing to a 14:10 and that helped. Important to note here - if you're doing hexarelin for any kind of body composition goal and you're also committed to fasting, you really need to think about how these two things are going to interact. The ghrelin receptor agonism is fighting your fasting intention every single morning and you need a strategy.

Sleep quality went up noticeably in week 2. This is the thing I always look for with GH secretagogues because the slow wave sleep amplification is real and it's one of my primary reasons for running any of this class of compound. I use an Oura ring and my deep sleep numbers were visibly different, averaging maybe 25-30 more minutes per night which sounds small but if you've tracked sleep seriously you know that's actually meaningful.

Week 3 and 4:

This is where things got interesting and also where I made a mistake I want to flag for everyone. Around day 19 I decided to bump to 200mcg because I felt like the initial response was tapering and I'd read that desensitization happens relatively quickly with hexarelin compared to other GHRP compounds. That part is true and it's a real thing to factor into your planning. But what I didn't adequately account for was the cortisol response.

Hexarelin does stimulate cortisol and prolactin in a way that ipamorelin specifically does NOT (which is one of ipa's selling points). At 200mcg I started noticing I was feeling kind of wired and anxious in a way that didn't feel like good stress, it felt like cortisol dysregulation. I was also waking up around 3-4am which is a classic cortisol rhythm disruption signal. This persisted for about a week before I connected the dots. I was so focused on the GH side of the equation that I kind of dismissed the HPA axis implications.

I brought the dose back to 100mcg for week 4, added ashwagandha back into my stack (I had cycled off it) and started doing more deliberate parasympathetic work in the evenings, longer walks, breathwork before bed, really leaning into the nervous system regulation piece that people like Dr. Molly Maloof talk about constantly. The 3am waking resolved within 4-5 days.

Week 5 and 6 I switched to a 5 on 2 off approach to try to manage the desensitization and also give my pituitary a break. Kept dosing at 100mcg on active days, pushed the injection to about 1 hour post workout on training days because I wanted to stack that with the natural GH pulse you get from resistance training. This felt like a smarter approach overall.

What I noticed by the end of the full 6 weeks:

Recovery between sessions genuinely improved, this was the most obvious objective signal. I train 4x per week and the soreness duration dropped pretty noticeably, I was consistently functional by day 2 after heavy sessions. Skin looked better - I know that sounds vague and wellness-influencer-y but the collagen synthesis piece is real and my skin genuinely had more density and elasticity, my partner even commented unprompted which I take as valid external validation. Body composition shifted slightly, not dramatically, maybe 1-1.5% BF reduction estimated, I maintained or slightly increased lean mass. Sleep remained improved throughout.

Things I would do differently:

Start at 100mcg and STAY there longer before considering any bump. The desensitization issue is real but bumping the dose is not necessarily the answer, cycling more aggressively is probably smarter. Also really think hard about the cortisol management piece BEFORE you start, not reactively. If your baseline stress levels are already elevated, hexarelin might not be the right tool right now or you need more robust adaptogens and recovery practices in place first. Dave Asprey has talked about this in terms of not adding stressors when your stress bucket is already full and I think that framework applies here even if you think his specific protocols have gone off the rails in recent years.

Also I would 100% consider stacking with something that specifically does NOT hit the cortisol/prolactin pathways if I do this again - ipamorelin combo honestly makes sense from a harm reduction standpoint, you get synergistic GH release and ipamorelin keeps the cortisol impact neutral.

Happy to answer questions on the specifics. This community has given me so much over the years and I try to give back with detailed write-ups when I can.

omg okay I finally made an account just to reply to this because I've been lurking on this thread for like 20 minutes and YES to literally everything you said about the cortisol piece

biohack_bella_87 wrote:Around day 19 I decided to bump to 200mcg because I felt like the initial response was tapering and I'd read that desensitization happens relatively quickly with hexarelin compared to other GHRP compounds.

this is EXACTLY what happened to me lol. I did the same thing, felt like it was tapering off so I went up and then suddenly I'm lying awake at 3am like why am I literally vibrating rn. took me way longer than a week to figure out what was happening though so good on you for connecting the dots faster than I did

and the hunger thing!! nobody warned me about that either. I was doing 16:8 too and I genuinely thought something was wrong with me the first few days. I was like am I sick?? why am I thinking about food at hour 10 like its been 3 days. I ended up just giving up on my fasting window for most of the run if im being honest, which was kind of annoying because I was partly running it for body comp reasons in the first place lol

the sleep improvement for me was also the most noticeable thing and honestly its the reason I stuck with it as long as I did. my deep sleep went noticeably up too and as someone who has been chasing better sleep quality for like 2 years its kind of hard to walk away from that even when other stuff feels off

the ashwagandha add-back was smart btw, I wish I had thought of that sooner during my run instead of just white-knuckling through the anxiety feelings thinking it would pass on its own

thanks for writing all this out, genuinely one of the most useful write ups I've seen on here

biohack_bella_87 wrote:I kept hearing from various corners of the community (shoutout to the Nootopia guys and some of the older threads on Longecity that I fell down a rabbit hole on) that the cardioprotective angle was underexplored.

The cardioprotective angle is real but let me be precise about something because this writeup blurs a few things together in ways that matter.

The CD36 binding you mentioned is relevant but the cardiac effects of hexarelin operate largely independent of GH release. This is not a minor distinction. The hexarelin cardiac data comes from models where GH secretion was not the mechanism, meaning you cannot assume your GH-optimized protocol is also optimizing whatever cardioprotective signaling you're after. They are not automatically the same thing.

Also the desensitization piece. You said bumping the dose is "not necessarily the answer" and cycling is smarter. Yes. But you still bumped the dose first and wrote about it like it was a reasonable thing to try. Pick a lane. The desensitization with hexarelin at the receptor level is fast and going from 100 to 200mcg when you're already downregulating those receptors is not going to rescue your response, it's going to accelerate the problem and load more cortisol on top of it, which you experienced firsthand and then described in detail. Not sure why this isn't the main warning in your writeup instead of buried in the "what I'd do differently" section.

The ipamorelin stack suggestion at the end is the most useful thing here. That should have been paragraph one.

xX_SleepQueenXx wrote:thanks for writing all this out, genuinely one of the most useful write ups I've seen on here

It's a decent experiential log. It is not a deep dive. The title promises more than it delivers on the mechanisms. Huberman references and podcast-blur citations do not constitute a deep dive.

GrumpyOldResearcher wrote:It's a decent experiential log. It is not a deep dive. The title promises more than it delivers on the mechanisms. Huberman references and podcast-blur citations do not constitute a deep dive.

bro come ON. you really just showed up to dump on somebody's 6 week personal log because they didnt write a peer reviewed paper?? she literally said this was her experience and what she observed. nobody asked for a mechanisms lecture from the grumpy professor over here lol

and the thing that REALLY gets me is you spent half your post criticizing how she organized her writeup. like ok cool you would have structured it differently, nobody cares?? the point is she PUT THE WARNING IN THERE. whether its in paragraph 1 or the "what id do differently" section doesn't change the fact that the information is THERE for people to find. this isnt a journal submission where formatting determines your impact factor

GrumpyOldResearcher wrote:going from 100 to 200mcg when you're already downregulating those receptors is not going to rescue your response, it's going to accelerate the problem

ok THIS part you're not completely wrong about but guess what - she also said that herself!! and then she course corrected and SHARED what happened so other people dont do the same thing. thats literally the whole value of a personal log. people learn from trying stuff and reporting back. not everyone has your apparently encyclopedic knowledge sitting there ready to go before they even start

also the "podcast blur citations dont constitute a deep dive" thing is so condescending i cant even. this is a FORUM not pubmed. most of the useful real world info i have on peptides came from logs exactly like this one not from abstracts that cost $40 to read

bella this was a solid writeup, dont let grumpy over here make you feel like it wasnt worth posting

ok so I have been reading this whole thread and I feel kind of nervous even jumping in because clearly there are people here who know WAY more than me, but not sure if this is dumb to ask but...

biohack_bella_87 wrote:I would 100% consider stacking with something that specifically does NOT hit the cortisol/prolactin pathways if I do this again - ipamorelin combo honestly makes sense from a harm reduction standpoint

so this is actually really relevant to something I've been trying to figure out. I was looking at hexarelin specifically for recovery and healing purposes (I have a nagging shoulder thing that isn't fully resolving and someone in another thread mentioned the cardiac and connective tissue angles), but honestly after reading about the cortisol piece I'm second guessing myself...

like my stress baseline is already pretty high right now honestly. work stuff, not sleeping great, the usual. so reading your experience with the 3am waking and the wired/anxious feeling is kind of making me think maybe I should just start with ipamorelin/CJC instead and save hexarelin for when my life is less chaotic? or am I overthinking this?

also and sorry if this is a really basic question, if you did the ipa/hexarelin combo would you inject them at the same time or separate them out? like does timing matter between the two or can you just do them together? I genuinely don't know and I'd rather ask and feel dumb than mess something up

GrumpyOldResearcher wrote:The CD36 binding you mentioned is relevant but the cardiac effects of hexarelin operate largely independently of GH release.

this part actually confused me a little, not sure if I'm reading it right. does that mean if someone was interested in hexarelin more for the recovery/tissue side of things vs the GH pulse stuff, the protocol would look different? or does it not really matter at those doses?

sorry for all the questions, genuinely just trying to figure out if this is the right thing for my situation or not

GrumpyOldResearcher wrote:It's a decent experiential log. It is not a deep dive. The title promises more than it delivers on the mechanisms. Huberman references and podcast-blur citations do not constitute a deep dive.

okay I'm sorry but I genuinely cannot let this slide and I know gainz_peptide_bro already said something but I have to add my two cents because this is REALLY bothering me

like who ASKED you to grade her post?? she wrote up 6 weeks of her personal experience in detail, warned people about real things that happened to her body, and shared it with the community for FREE and your response is basically "your citations aren't good enough and you buried the lede"??

that is so unhelpful it's actually unreal

and ok I'm a beginner I will fully admit that. I don't have your fancy mechanisms knowledge or whatever. but I learned more from bella's writeup and honestly from my OWN experience going through similar stuff than I ever would from someone just lecturing me about CD36 receptors without any real world context attached to it. knowing that someone else woke up at 3am feeling wired and anxious and that it resolved when she dropped the dose and added ashwagandha back?? that is ACTIONABLE. that helped me. your correction about how cardiac effects are "independent of GH release" is... cool I guess?? what am I supposed to DO with that lol

also the way you replied to my comment specifically really rubbed me wrong. "it's a decent experiential log" ok THANKS DAD I said it was useful to me and it WAS. I'm allowed to have that opinion without you coming in to grade it

peptide_n00b_2023 wrote:my stress baseline is already pretty high right now honestly. work stuff, not sleeping great, the usual. so reading your experience with the 3am waking and the wired/anxious feeling is kind of making me think maybe I should just start with ipamorelin/CJC instead

hey noobie!! don't apologize for asking questions, that's literally what this forum is for. and honestly?? yes I think you're making the right call. from my own experience I really wish I had started with something gentler when my stress was already elevated. the 3am waking thing is not fun and when you're already running on empty it just makes everything worse. starting with ipa/cjc sounds totally reasonable to me

peptide_n00b_2023 wrote:does that mean if someone was interested in hexarelin more for the recovery/tissue side of things vs the GH pulse stuff, the protocol would look different? or does it not really matter at those doses?

This is actually a genuinely interesting question and I want to address it properly because GrumpyOldResearcher raised the CD36 point correctly and it deserves more than a passing mention.

The short answer is: yes, the mechanistic distinction matters, though at the practical level of community self-experimentation it is difficult to fully isolate. Hexarelin's binding at CD36 has been investigated in cardiac tissue contexts - Bodart et al. (2002) published work establishing that the cardioprotective effects observed with hexarelin were maintained in GH-deficient animal models, which strongly supports the argument that at least some of hexarelin's tissue-level effects are occurring through a GH-independent pathway. Whether this translates meaningfully to connective tissue recovery at the doses being discussed in this thread is honestly an open question that I do not think has clean clinical data behind it yet.

Which brings me to what I actually wanted to ask you directly, because your situation raises something specific that I think warrants careful thought before anyone advises you either way.

You mentioned a shoulder issue that is not fully resolving. Can you be more specific about the nature of the injury? Tendinopathy, partial tear, post-surgical, chronic impingement? The reason I ask is that if your primary goal is connective tissue recovery specifically, the argument for BPC-157 or TB-500 over hexarelin as a starting point is quite strong and the cortisol considerations you are already correctly worried about become largely irrelevant to that conversation. Hexarelin is not typically the first-line peptide recommendation for localized tissue healing. It is being discussed in this thread primarily in the context of GH secretion, body composition, sleep architecture, and the more speculative cardioprotective angle.

What specifically pointed you toward hexarelin for the shoulder rather than the more commonly cited healing peptides?

dr_peptide_research wrote:Hexarelin is not typically the first-line peptide recommendation for localized tissue healing.

ok hold on i gotta jump in here because this is something i actually see get pushed around a LOT and it kinda drives me crazy

dr_peptide i respect the Bodart citation drop, genuinely, but i gotta call out something that happens constantly in these threads - people see "hexarelin" + "cardioprotective" + "tissue effects" and they just start connecting dots that arent necessarily there. like someone mentioned it for connective tissue and now we're deep in a CD36 rabbit hole when honestly the answer for a nagging shoulder is way more boring and straightforward lol

peptide_n00b_2023 wrote:someone in another thread mentioned the cardiac and connective tissue angles

ok noobie no offense but THIS is exactly what im talking about. who told you hexarelin for a shoulder?? what thread was that?? because that advice is kinda sus tbh. the connective tissue angle for hexarelin specifically is way more speculative than people make it sound. you want shoulder healing?? BPC-157 + TB-500. thats literally the go-to stack, thats what has the most real world logs behind it, thats what people have been running for healing purposes for years. the evidence base for THOSE compounds for localized recovery is way stronger than anything hexarelin brings to that specific party

like dr_peptide basically said this too but i wanna say it more directly - somebody steered you toward hexarelin for a shoulder injury and that steering is questionable. go find that thread and be skeptical of whoever said it lol

and yeah co-signing what sleepqueen said to you - high stress baseline + not sleeping great + adding hexarelin is a rough combo. ipa/cjc is 100% the smarter starting point for where youre at rn

gainz_peptide_bro wrote:dr_peptide i respect the Bodart citation drop, genuinely, but i gotta call out something that happens constantly in these threads - people see "hexarelin" + "cardioprotective" + "tissue effects" and they just start connecting dots that arent necessarily there.

I want to respectfully push back on part of this characterization, though I do think your practical advice to peptide_n00b_2023 lands in roughly the right place.

The issue I have is with framing the CD36 discussion as a rabbit hole distraction. It is not. GrumpyOldResearcher was correct to raise it, and dr_peptide_research was correct to elaborate on it, and I think dismissing it as speculative dot-connecting actually does a disservice to the newer members reading this thread who are trying to build a genuine foundational understanding of how these compounds operate. The Bodart et al. work is not obscure or fringe - it is one of the more cited pieces in the hexarelin literature precisely because the GH-independence of certain tissue-level effects is mechanistically significant and changes how you should think about the compound entirely.

That said, I want to be precise about where I actually disagree with you versus where I think you are essentially correct.

Where I think you are correct: BPC-157 and TB-500 are far better supported in the community literature and in available research for localized connective tissue recovery. For a nagging shoulder that is not resolving, the evidence base behind those two compounds - particularly BPC-157 for tendon and ligament contexts - is considerably more developed than anything hexarelin brings to that specific application. On that point I am fully aligned with you and with dr_peptide_research.

Where I respectfully disagree: Calling the connective tissue angle for hexarelin "way more speculative than people make it sound" is itself an overcorrection that loses some nuance. The systemic GH elevation that hexarelin produces does have downstream implications for collagen synthesis and tissue remodeling - biohack_bella_87 actually noted the skin density change which is a surface-level signal of that. The question is not whether there is any mechanistic plausibility, it is whether the effect size is meaningful for localized injury recovery compared to targeted peptides. That is a different and more precise objection than "it's speculative."

peptide_n00b_2023 wrote:my stress baseline is already pretty high right now honestly. work stuff, not sleeping great, the usual.

I also want to address this directly because I think it is the most important practical consideration in this entire subthread. Before I would feel comfortable offering any specific protocol suggestion, I would genuinely want to know more about what your sleep disruption looks like currently - onset issues, maintenance issues, early waking? - and whether you have any bloodwork on hand, even basic cortisol or a hormone panel. Running a GH secretagogue of any class when your HPA axis is already dysregulated is something I would want to think carefully about, not because it is necessarily contraindicated but because the baseline matters enormously for interpreting your response and protecting yourself from attributing new symptoms to the wrong cause.

The ipamorelin/CJC-1295 suggestion as a starting point is reasonable given what you have shared, but I would ask those clarifying questions before endorsing anything more specific.

dr_peptide_curious wrote:Before I would feel comfortable offering any specific protocol suggestion, I would genuinely want to know more about what your sleep disruption looks like currently

Okay this thread has gone full peer review committee and I feel like someone needs to crack a window in here.

peptide_n00b asked a pretty simple practical question and now they've got four people in lab coats standing around their shoulder injury like it's a case presentation at grand rounds. "Can you specify the nature of the injury? Tendinopathy? Partial tear? What is your cortisol panel showing?" Bro they have a sore shoulder from probably benching wrong for six months, not a rare autoimmune condition.

I half expected someone to ask for their VO2 max and a 23andMe report before giving a protocol suggestion.

The actual answer for n00b is what gainz already said - BPC-157 + TB-500, done. That's it. That's the thread. The rest of this is a very engaging debate that has approximately zero bearing on someone's rotator cuff.

Not dunking on the CD36 convo, genuinely interesting stuff. But we went from a hexarelin log to a graduate seminar in about 8 posts flat. Impressive honestly.