ForumInjection Technique

Mixing multiple peptides into one syringe for fewer daily shots

9 replies5 peopleJan 8, 2026☆ Follow
Summary

Can several peptides be drawn into the same syringe to reduce the number of daily injections?

Users report that tirzepatide and other GLPs should stay in their own syringes because mixing produces a thick gel. Glutathione is also kept separate due to its thickness, smell, and burning sensation. KPV, Selank, and DSIP are viewed as compatible for combining in one pin. Opinions differ on whether two GLP-1s can be mixed without issues, and no one settles on ideal starting doses or long-term safety of combinations.

What this discussion establishesWhere people disagree

Whether two GLP-1 agonists can safely share a syringe; one user calls it a gray area with personal success while another reports an epoxy-like result

Still open

Whether the proposed starting doses are appropriate and how to best dilute glutathione for smaller-gauge needles without degrading it

Nothing here is advice.

9 replies · 5 people
LevelThistle41archiveopening postJan 8

I ordered KPV, Selank, DSIP and Glutathione while already using tirzepatide. My schedule calls for five shots a day, which feels like too many. I plan to pull KPV, Selank and DSIP into one syringe, keep Glutathione separate because of the volume, and leave tirzepatide by itself since it should never be mixed with anything else. Any thoughts on that plan? Do the starting doses seem reasonable? Figuring out the right amounts has been difficult.

LevelLedger10archiveJan 8

GLPs do not mix well with other compounds and can turn into a thick gel that is hard to push through a fine needle. There is a chart that shows which peptides can be combined in one container. Glutathione probably needs its own syringe as well. The best approach may be to check the best time of day for each compound and look for any overlapping benefits.

CopperAlder51archiveJan 8
↳ replying to @LevelLedger10

You got there first. Be sure to check the disclaimer at the top. Data from wellness clinics may not be perfect, but it is better than nothing.

ClearHarbour45archiveJan 8

I combine reta or tirz with sema in the same pin without problems, but glutathione gets its own because it burns and has a strong sulfur smell. I use a 3cc 23-gauge needle for it since the solution is thick. I add 3cc of bac water to a 1200mg vial and inject 1.5cc twice a week. Is there a way to use a slin pin instead? Does warming it ruin the product fast?

LevelThistle41archiveJan 8
↳ replying to @LevelLedger10

Thanks, that matches what I read about not mixing GLPs. It looks like the first three can go together, which simplifies things. I will draw those into one syringe and handle glutathione and tirzepatide separately. Is a 23g needle painful? Was the reconstituted solution actually thick? Could adding more bac water make it thinner?

ClearHarbour45archiveJan 8
↳ replying to @LevelThistle41

It does not hurt much, no worse than a 25 or 27g. You could add more bac water, but that means injecting a full 2cc three times a week. Slight warming lets it go through any needle, yet reports say even 45 minutes at room temperature after mixing makes it useless. I am looking into liquid liposomal glutathione now. Maybe trying 4.5cc of bac water and three 1.5cc shots would work.

ClearHarbour45archiveJan 9
↳ replying to @LevelLedger10

GLP-1 with another GLP-1 is listed as a gray box, not red. I have done it for over a year and never saw any gel form.

LevelLedger10archiveJan 9
↳ replying to @ClearHarbour45

Fair enough. I generalized too much. I had leftover reta and SS-31 and tried mixing them anyway. It turned into something like epoxy.

ClearHarbour45archiveJan 9
↳ replying to @LevelLedger10

There is no real research, only assumptions, and I worry it could raise side effects with pancreatitis as the worst outcome. Some spa sites claim matching pH values make it acceptable at low doses, but most sources warn against it. You might be right that we could be shortening our lives instead of lengthening them.

SteadyAlder49archiveJan 9
↳ replying to @ClearHarbour45

You can draw it into a larger-gauge luer-lock syringe while the vial stays cold, then swap to a finer needle once the syringe warms a bit. That might let you use a 30g pin without risking the whole vial.

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