Can a Peptide Pen Handle Testosterone? I Tested It
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We will leave this thread as intended for Pen topics
Heres a new thread on Test for everyone
https://community.peptidecritic.com/topic/2782/the-testosterone-thread-read-your-labs-understand-your-protocol/2 -
Yes — I’ve actually done this successfully with the Gansulin Auto Injector Research Pen purchased on this site.
My Test C comes from TRT Nation, is in grapeseed oil, and the Gansulin handled it just fine. I used a 30G 5/16" (8 mm) pen needle and had no issues.
The key is just to keep your thumb held down on the injector the entire time, and let it work. You’ll literally hear/feel it going click, click, click, click, click as it slowly pushes the oil through. It takes a little bit, but it injected perfectly fine and was super smooth.
Honestly, I found it a hell of a lot easier and more convenient than drawing Test C into a regular syringe every time.

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Not sure how to find what oil mine has. But it is Rx sourced. I have had a filled cartridge sitting in a pen for 3 months and I just started using it again. There is no leakage past the plunger. It moves very nicely. Only, the plastic that makes the pen cap snap onto the main component is degrading and falling apart. All other polymers seem to be fully intact despite that the oil migrates everywhere.
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@vpeptides my husband tried his Rx cottonseed oil Tc subQ and had a ISR welt that lasted a week the two times he tried it. No reaction to grey MCT base though.
12mm is still subQ. 1” and longer is IM.@MyB I have a question about this. How can I get the MCT oil version? Really need help with this.
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@MyB I have a question about this. How can I get the MCT oil version? Really need help with this.
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@MyB I have a question about this. How can I get the MCT oil version? Really need help with this.
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Update….Ive tried a couple different pens in the last couple weeks and Im back to using a Xulin pen with 29g 3/8” tip subq.
I tried a savvio because it has a metal pushrod and figured it might be a good idea for pushing a thicker liquid but I don’t like the lack of audible click and the pen itself is smooth to the point its hard to grip. Same goes for the Novopen (though I like them very much for my CJC/Ipa and klow). I have yet to try a V4 so we’ll see. -
Im trying the savvio, but i keep the whole thing in a baby wipe warmer. So far so good, it seems more precise dosing than the gansulin, and the warm MCT seems to flow very smoothly with very little pip.
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I've got a V3.5 that I picked here that I have been using with my Test-C and have not has any issues. I load 2 weeks worth in a 3ml vial cartridge (ordered from here) and inject with, 29G, .5 inch pen needles. I've taken empty cartridges apart after finish and inspect the rubber stopper, never found any degradation. Only MCT oil tested with so far. I use with Test-P/MCT as well, no issues either.
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I've got a V3.5 that I picked here that I have been using with my Test-C and have not has any issues. I load 2 weeks worth in a 3ml vial cartridge (ordered from here) and inject with, 29G, .5 inch pen needles. I've taken empty cartridges apart after finish and inspect the rubber stopper, never found any degradation. Only MCT oil tested with so far. I use with Test-P/MCT as well, no issues either.
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