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  3. We tested peptide degradation so people can stop guessing
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We tested peptide degradation so people can stop guessing

Scheduled Pinned Locked Moved Peptide Discussion
lab-teststoragemazdutideglp2-tmots-c
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  • ? A Former User

    @randy Not that I'm questioning you, but in the interest of openness I'm curious if your actual test result docs state that this was reconstituted vials tested. The reason I ask is there are gymbros on dudetube saying the same things, but the test results (in one particular example from Janoshik) say nothing about whether the test was on reconstituted peptide or just lyophilized. Again not saying you are being dishonest, but the other guy's test results were definitely ambiguous.

    RandyR Online
    RandyR Online
    Randy
    wrote last edited by Randy
    #26

    @kj4otu "All samples in this study were prepared using bacteriostatic water with 0.9% benzyl alcohol."

    It's sprinkled all throughout the post.

    If we didn't reconstitute them, the tests would be worthless. There would also be no degradation of any kind.

    "If it doesnt come in a needle. It doesn't work"

    ? 1 Reply Last reply
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    • D Offline
      D Offline
      daring
      wrote last edited by
      #27

      I imagine an even faster decline with the daily in/out of the fridge...

      RandyR M 2 Replies Last reply
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      • B bangkokiscool

        I'm curious to see the sharp drop after a few months for Tirz even in the fridge. How does the pharma pen stay valid for their expiry dates?

        F Offline
        F Offline
        flyhigh
        wrote last edited by
        #28
        This post is deleted!
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        • B bangkokiscool

          I'm curious to see the sharp drop after a few months for Tirz even in the fridge. How does the pharma pen stay valid for their expiry dates?

          F Offline
          F Offline
          flyhigh
          wrote last edited by
          #29

          @bangkokiscool Pharmaceuticals pens and compounding have a lot of additives to stabalize. IVMedco compounded Tirzepatide for example is Tirz, Vitamin B12, Sodium Chloride, Sodium Dibasic Heptahydrate and Water plus HCL to balance ph if needed.

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          • S Offline
            S Offline
            Steve
            wrote last edited by
            #30

            Aaand this is why I love this site. Thanks for doing the leg work on this.

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            • D daring

              I imagine an even faster decline with the daily in/out of the fridge...

              RandyR Online
              RandyR Online
              Randy
              wrote last edited by
              #31

              @daring Not really — the fridge samples in the study sat the entire time at room temp and showed little drop by day 15 even. The brief temperature excursion from pulling a vial out, drawing a dose, and putting it back takes maybe 30–60 seconds and barely moves the needle on cumulative thermal exposure. If if you let it warm up to room temp before putting it back i thats only hours of time at room temp over the course of a cart, The bigger drivers are overall storage temperature and time.

              "If it doesnt come in a needle. It doesn't work"

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              • D daring

                I imagine an even faster decline with the daily in/out of the fridge...

                M Offline
                M Offline
                matthewwalsh
                wrote last edited by
                #32

                @daring I was curious about the same thing so ran it through AI and here what was reported:

                "One stability guide notes that if reconstituted MOTS‑c is kept at 4 °C continuously, it stays >95% pure for about 28 days; intermittent warm excursions accelerate loss, dropping to ~85% by 14 days and <70% by 28 days when repeatedly warmed to room temperature."

                This correlates somewhat with what Jeff reported on his very awesome study (Thank You Jeff!) although his study reported more degradation at 31 days than sighted here.

                Nonetheless, given enough correlation I think I can assume with a high degree of confidence based on both sources of info that yes I could expect MOTS C to degrade considerably more warming to room temperature for injection rather than continuously refrigerating.

                I also asked AI about injecting sub peptide at 35 degrees F...

                "For a typical subcutaneous peptide injection (like 0.25–0.5 mL in belly fat), having the solution very cold mainly increases local discomfort and the chance of a small lump or irritation, but it’s unlikely to cause deep or systemic damage by itself."

                Based on all of this, I think I'll refrigerate of course, take my pen straight away and inject sub then put peptidecritic pen back into the frig. Not recommending this to anyone else but that's what I think I'll do for my rat. Of course it depends on lots of different variables not the least of which how long you expect your vial to be stored before being fully dispensed into your rat.

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                • RandyR Randy

                  @kj4otu "All samples in this study were prepared using bacteriostatic water with 0.9% benzyl alcohol."

                  It's sprinkled all throughout the post.

                  If we didn't reconstitute them, the tests would be worthless. There would also be no degradation of any kind.

                  ? Offline
                  ? Offline
                  A Former User
                  wrote last edited by
                  #33

                  @Randy I get that you said it multiple times. I am asking about the actual coa document/lab results from the testing lab. I would like to see that posted and would like to see it state the actual test parameter. Like I said, I’m not trying to question your statement just asking for verification. Others posting these same comments in testing have also not shown the actual test results from the lab. Your stuff seems different/more legit so I assumed you would jump at the chance to show lab verification. No offense but I don't actually know you. Trust but verify you know. Again not trying to just make waves here.

                  RandyR 1 Reply Last reply
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                  • B brandenscheidecker

                    @kj4otu If your read this post he clearly spell it out "one diluent type"

                    ? Offline
                    ? Offline
                    A Former User
                    wrote last edited by
                    #34

                    @brandenscheidecker if you’ll read my post you see that I acknowledge what he SAYS but I am asking for the actual documents from the lab showing the test parameters. I’ve yet to see anyone claiming to do this test that shows the labs docs listing the test parameters as reconstituted. I would like to see it truly put to bed. Trust but verify man. I think that is the name of the game in this industry. At least if you’re smart.

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                    • ? A Former User

                      @Randy I get that you said it multiple times. I am asking about the actual coa document/lab results from the testing lab. I would like to see that posted and would like to see it state the actual test parameter. Like I said, I’m not trying to question your statement just asking for verification. Others posting these same comments in testing have also not shown the actual test results from the lab. Your stuff seems different/more legit so I assumed you would jump at the chance to show lab verification. No offense but I don't actually know you. Trust but verify you know. Again not trying to just make waves here.

                      RandyR Online
                      RandyR Online
                      Randy
                      wrote last edited by
                      #35

                      @kj4otu Here's the Raw Data for each: Screenshot 2026-04-24 at 8.11.01 AM.png Screenshot 2026-04-24 at 8.11.16 AM.png Screenshot 2026-04-24 at 8.11.28 AM.png

                      "If it doesnt come in a needle. It doesn't work"

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                      • C Offline
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                        Commander
                        wrote last edited by
                        #36

                        Those read like instruction on setting the clock on a Chinese VCR. Thank god there are smart people that can interpret them and share the easy versions...

                        Please excuse my typos. Small Phone & Bad Eyes

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                        • RandyR Online
                          RandyR Online
                          Randy
                          wrote last edited by
                          #37

                          @commander yeah they're useless unless you are the lab tech.

                          @kj4otu asked for the raw results after not reading the original post saying what the dilutant was. Believe the data or don't. ...or better yet spend 5k on tests and do it yourself 🙂

                          "If it doesnt come in a needle. It doesn't work"

                          P ? S 3 Replies Last reply
                          3
                          • RandyR Randy

                            @commander yeah they're useless unless you are the lab tech.

                            @kj4otu asked for the raw results after not reading the original post saying what the dilutant was. Believe the data or don't. ...or better yet spend 5k on tests and do it yourself 🙂

                            P Offline
                            P Offline
                            PeptidePete
                            wrote last edited by PeptidePete
                            #38

                            @Randy said in We tested peptide degradation so people can stop guessing:

                            @kj4otu asked for the raw results after not reading the original post saying what the dilutant was. Believe the data or don't. ...or better yet spend 5k on tests and do it yourself 🙂

                            Illustrative example of why we just can't have nice things anymore.

                            "or better yet spend 5k on tests and do it yourself :)"

                            I really appreciate all that you do Jeff! Thanks for the stability reports, tremendous value. AT NO COST TO ME 😀

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                            • ResearchCatR Online
                              ResearchCatR Online
                              ResearchCat
                              wrote last edited by
                              #39

                              @matthewwalsh I inject cold all the time; I don’t care. I don’t think there is any more discomfort than at room temperature, or, again, I don’t care. If that is a concern, do what I do for my bride’s rat(she has concierge service!) and draw the syringe, letting that get to room temperature while the vial is back in the fridge.

                              Be wary using AI for this. It’s mostly scraping all the other web sites and posters, which are all either repeating one source(e.g. bac water goes bad after 28 days) or are aggregating made up stuff that isn’t verified.

                              I am not saying it isn’t useful, but I am using AI for work and it’s just great when you ask it to summarize regulatory requirements for financial derivatives and it makes up answers when it can’t find what you’re looking for.

                              Yeah, well, I’m just here for the research, man. - The Dude

                              If I haven’t liked your post, no offense. I have exceeded my daily allowance.

                              M C E S 4 Replies Last reply
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                              • ResearchCatR ResearchCat

                                @matthewwalsh I inject cold all the time; I don’t care. I don’t think there is any more discomfort than at room temperature, or, again, I don’t care. If that is a concern, do what I do for my bride’s rat(she has concierge service!) and draw the syringe, letting that get to room temperature while the vial is back in the fridge.

                                Be wary using AI for this. It’s mostly scraping all the other web sites and posters, which are all either repeating one source(e.g. bac water goes bad after 28 days) or are aggregating made up stuff that isn’t verified.

                                I am not saying it isn’t useful, but I am using AI for work and it’s just great when you ask it to summarize regulatory requirements for financial derivatives and it makes up answers when it can’t find what you’re looking for.

                                M Offline
                                M Offline
                                matthewwalsh
                                wrote last edited by
                                #40

                                @ResearchCat Wise advice! Great to get your testimonial on injecting cold - way more helpful to hear real life applications than from a machine for sure. I so appreciate Jeff paying for and sharing real testing results that gives me great confidence in my approach.

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                                • M Offline
                                  M Offline
                                  matthewwalsh
                                  wrote last edited by
                                  #41

                                  And btw... I'm using peptidecritic v4 pen and would highly recommend that to anyone - bought more than one and love these peptide pens. Just so damn convenient (and not painful at all) over single injection syringe.

                                  1 Reply Last reply
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                                  • ResearchCatR ResearchCat

                                    @matthewwalsh I inject cold all the time; I don’t care. I don’t think there is any more discomfort than at room temperature, or, again, I don’t care. If that is a concern, do what I do for my bride’s rat(she has concierge service!) and draw the syringe, letting that get to room temperature while the vial is back in the fridge.

                                    Be wary using AI for this. It’s mostly scraping all the other web sites and posters, which are all either repeating one source(e.g. bac water goes bad after 28 days) or are aggregating made up stuff that isn’t verified.

                                    I am not saying it isn’t useful, but I am using AI for work and it’s just great when you ask it to summarize regulatory requirements for financial derivatives and it makes up answers when it can’t find what you’re looking for.

                                    C Offline
                                    C Offline
                                    Commander
                                    wrote last edited by
                                    #42

                                    @ResearchCat
                                    Yep, way too many people rely on AI….

                                    Please excuse my typos. Small Phone & Bad Eyes

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                                    • RandyR Randy

                                      @commander yeah they're useless unless you are the lab tech.

                                      @kj4otu asked for the raw results after not reading the original post saying what the dilutant was. Believe the data or don't. ...or better yet spend 5k on tests and do it yourself 🙂

                                      ? Offline
                                      ? Offline
                                      A Former User
                                      wrote last edited by A Former User
                                      #43

                                      @Randy Nope. I read it all and told you I did. You say yourself to question everything. So there you go. Thanks for the data. I appreciate it. Also, as I said before, I appreciate what you do, I'm just trying to dig deeper as I hear you guys say all the time. I do get that you aren't selling this stuff, so you really don't have a reason to fake anything, but with this stuff I really don't trust much of anyone without verification. I don't think you can blame me lol.

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                                      • M Offline
                                        M Offline
                                        mfadden99
                                        wrote last edited by
                                        #44

                                        Thank you for doing this

                                        1 Reply Last reply
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                                        • J Offline
                                          J Offline
                                          jborja
                                          wrote last edited by
                                          #45

                                          Thanks for this and the video Jeff and @randy !
                                          For Tirz, assuming it’s pharma 503b grade (different water for injection and solution, but bear with me here)is it safe to assume that it stays pretty well situated in the fridge (assuming it’s not being degraded by light) for at least 61 days if we are to assume the first day is the Best use date/ BUD? Curious because I’ve heard people use meds way past BUD date and swore it’s ok

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