Cartridge use
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Yeah one time. You could technically refill them by just pushing a peptide in but the cartridge glass being exposed to the outside world inside the pen causes it to no longer be sterile.
Pens are a more expensive option. For weekly stuff the old fashioned way is usually how we do things. For daily research or traveling pens are the way.
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Thats a good question for @randy … I think he swaps them but when i was doing 4 peptides like bpc, TB, KPV, Ghk in all different pens i would use the same needle and toss it when done.
Got the blend now so not needed.
However i never mixed the needle with my RETA
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P PeptideCritic moved this topic from Injection Pens & Devices on
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