Peptide Critic Community

@EXTROPIAN said: @cc4part41 What we really need is some kind of micro ekg skin nerve detector or pins laced with Lidocaine. Now you're talking. Stick and pray isnt working great.

Wow, That must have just happened in the past few days, as they were there last weekend. It looks like the whole channel was taken down. One of the challenges in this space is that if it looks like you are recommending people use peptides on themselves, they will kill your entire channel. It’s really too bad, because the videos were very informative about safe use and handling of peptides for research.

I use them occasionally. You have to get the 3M Curos alcohol caps to cover the threads. The cap has to be changed every 7 days or anytime you remove it to draw solution. It takes more planning if you're researching several peptides. I try to reconstitute multiple peps on the same day to avoid wasting caps but doesn't always work out with timing. Also the shroud on the adapter doesn't always sit flush with the Hospira rubber stopper. I use a 3d printed clamp to do so and store it in a case. https://makerworld.com/models/1566363?appSharePlatform=copy https://makerworld.com/models/1260218?appSharePlatform=copy

@queeny You won’t get lost. Unlike a lot of people in this space, Jeff’s videos tell you what they are about, and then tell you. They don’t ramble for 20 minutes about the “Peptide Secret Everybody is Wrong About!(Watch till the end for the 5 seconds where I tell you!)”

@damic thank you so much. I appreciate your help.

I take my SS-31 daily with my Xulin 3. I use pens for peptides I research with daily or at least multiple times a week. That's where the efficiency really helps. You are taking a much high dose than I am, so I can't attest to the stinging. I'm using 4mg/day in preparation for a MOTS-C cycle. I might bump it up to 6mg/daily. I felt like the doses in the 20-40mg range were more aligned to the study for Barth Syndrome for major mitochondrial disfunction. My goals are more athletic recovery, performance, and healthy aging. Good luck!

@CapmanCrunch Thanks Cap. The largest volume I inject is 70 units (Tirz).

I have heard from a practicing MD - peptide researcher that mixing random peptides together as a blend is not ideal and better to be avoided. The reason is that different molecules may demonstrate unwanted interactions with each other, we just don't know enough of chemistry and don't have a research of how they will interact. For example they may stick to each other, block each other, even react chemically. He suggested to use different vials and syringes for each peptide and even spread them in time enough to avoid interaction with each other in the body, unless it is the intended effect that you want. That's what he does with his clients and he has a large clinical practice.

Vials make the difference… also the finer the needle, the harder it will be to press. I had the Xulin from here and it was smooth. I gave it to my friend and she loves it for her Tesa. The vials make such a hige difference. I have shitty vials, but they are smooth. Bit some good vials are a little harder.

@ResearchCat said: I have the same thing happen. I assume it’s because the vials are kept cold so the liquid volume shrinks and when I insert the needle, it draws a small amount of air into it. Probably also why sometimes the needle drips a little as it warms up. This doesn’t happen all the time for me. Oddly of the three pens I am running right now, only one is doing this. Hey, Thanks for the reply. Yes also the dripping issue is relatable - i didn't mention it in my initial post. I'll try next week filling some pens with "cold" vials - to see what' s what. I've also ordered a new batch of vials from a more allegedly more reputable manufacturer. Thanks,

There is an app called Peptide tracker which I have found to be great. There is some setup time to load everything but it works well

@emkay I am addicted to pens teh xulin is great

The 12mm are easy to find. I need 5 or 6mm

The instructions say each pen has 3ml of solution. That means 40mg mixed with 3ml liquid. Using Randy's handy dandy reconstitution calculator at https://peptidecritic.com/tools/peptide-calculator, you get the following. For each 1mg dose, you would turn the dial on your pen 5 units. [image: 1779799195531-screenshot-2026-05-26-073719.png]

Randy, I have a bunch of pens from Peptide Critic. I like the v 3.5, can you get it in a few more colors? Thanks.

@phiberopttic I think it was Jeff that mentioned that Xulin only make Blue pens normally, but do a run of Red for a limited time when launching a new product. I also bought both colours of it straight away, cos he said they were Randy's favourite. Red one is out for delivery today. I wonder if we can 3d print pen bodies.

@jagerman said in Can anyone recommend a pen that can push subq T: @kenhnsy v2 is manual right? Maybe I need to get a manual pen where I can push harder and steadier. V2 is manual and has the retracting cover. I like this because I can inject my girlfriend's big brown beaver with a lot of pressure to get into the muscle and no risk of slipping side to side. I recommend having a case since the open end on the pen exposes it to the world of microbes during storage.

@jackie said in Traveling with research material.: When I put my back up up and removed my ipad, I said "I have refrigerated medicine" and they told me to leave it in my backpack when I flew out. When we flew home, they had me take it out of the backpack and put it in the bin with my ipad. They didn't ask what was in it or even look at it Yeah have read from many others on other forums too that TSA doesn't give a fk about your meds in the cabin bag. Maybe they are researching them too and understand. LOL

Do a test pin with just BAC water or saline. If it still bruises it’s the pen/needle itself or the way you actually pin - if it doesn’t- it’s the pep.