Can a Peptide Pen Handle Testosterone? I Tested It
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The vial plungers aren't meant for oil contact. After seeing what mct oil did to a travel mug lid seal I would be careful.
I would ask that when done please try and fish the plunger out and see how it held up. -
Or its own subcategory on the forum. . .

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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
12mm for a really fat person in the belly can be Subq but in the Delts and ventral Glute, is a shallow IMYou dont really need 1”
If hes doing 3x a week id go 29g 1/2”
Im going to do a whole thread on Testosterone,
It wont be for Women because i have helped many but my experience has been helping men
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@diegoc start it in the grey zone since it is a scheduled drug that requires a dea license to prescribe. That way you have to be logged in to view the thread.
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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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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.
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