Do You Filter Your Peptides Before Use?

[Mr. Blonde]

I've never filtered. No visible signs or issues that I know of. Of course I'm not disagreeing that filtering is probably for the best. But im living on the edge!

 

[catdog]

I've never filtered. No visible signs or issues that I know of. Of course I'm not disagreeing that filtering is probably for the best. But im living on the edge!

I’d figure it’s better to filter some peps compared to others (ie, Tesa vs tirz)

 

[randompersonrandom]

Now that I've learned to filter, I'll never NOT filter. It only adds a few bucks to the vial, and it gets me closer to what I'd be holding if I'd gone through a pharmacy and not through some guy on the other side of the world, using a woman's picture and calling me "dear." Plus, it only adds one or two extra actions if you're loading a cartridge for a pen.

 

[desinr-gal]

I don't filter. I've never heard of any research suggesting that my risk of infection would be significantly reduced by filtering. Some of the benefits that you claim do not, in my admittedly not scientific brain, make much sense. For instance, maximizing the purity of the product seems unlikely: Anything small enough to pass through the filter no matter how impure will get through. The purity numbers that the testing companies provide can be deceiving, however the testing companies will tell you that they only test for things that are close to the target peptide. They don't test for cyanide, for instance. I'm not suggesting any of the Chinese vendors are likely to give you cyanide; that seems more likely something that an American would do.

Someone somewhere said that bacteria are much bigger than filter

"holes" and are caught in filters, as would be bits of stuff like pcs of stoppers, or reemed core from piercing stoppers with the syringe.. I heard enough to decide it is worth it.. my 2 cents

 

[DFW007]

I don't filter my reconstituted peptides, but I will add some extra BA sometimes. The BA is what's going to safeguard you more than filtering from bacteria. I do filter the stuff I homebrew. Filtering is really more for particles/materials than could have fallen into the solution and BA it to make sure there is no bacteria. Filtering does add an extra layer of safety which isn't a bad thing. The type and size of filter listed is spot on the best way to go if you are going to start filtering your peptides.

As for refrigerating BAC. Hospira recommends against refrigeration even when opened. I however do refrigerate after opening. Hospitals don't refrigerate it either, but like I said above sometimes I will add a little more BA to make it like 1% instead of .9% for a little extra safety. Also, BAC is cheap. Don't use shit Amazon BAC. Buy Hospira BAC. I personally have like 20 3ml bottles at all times. If I really doubt something I just throw it away to lower risk.

what's BA? can I add it to Cagri?if so what is the ratio for say 10 mg vial?

 

[3Ljeffy]

what's BA? can I add it to Cagri?if so what is the ratio for say 10 mg vial?

Benzyl Alcohol. It is what's added to sterile water to make it bacteriostatic, usually at 0.9%. The result is what is commonly referred to as "BAC water" or standard "reconstitution solution." Some compounding pharmacies like Olympia will raise the level to as much as 2% which is closer to a bacteriocide than just bacteriostatic effect and makes it last much longer, but it increases the chance of injection site irritation or stinging. One thing to watch out for is raising the pH level too high and spoiling the peptide; tesamorelin is particularly sensitive to this. FWIW I prefer to use the Hospira version of BAC water that has both 0.9% benzyl alcohol and 0.9% sodium chloride, and mix it 1:1 with 0.6% acetic acid BAC water (Amazon sells Quality Research Chemicals version of this, and it tests ok). That provides a broad spectrum of bacterial protection, and keeps the pH level down below 5 or less for touchy peptides. That still might not be enough for cagrilintide which seems to want pH around 4-4.5 to prevent the formation of amyloid fibrils. Personally I find that risk way too high to try cagri in any form, but I hope this helps in your adventures.

 

[rsmith]

Benzyl Alcohol. It is what's added to sterile water to make it bacteriostatic, usually at 0.9%. The result is what is commonly referred to as "BAC water" or standard "reconstitution solution." Some compounding pharmacies like Olympia will raise the level to as much as 2% which is closer to a bacteriocide than just bacteriostatic effect and makes it last much longer, but it increases the chance of injection site irritation or stinging. One thing to watch out for is raising the pH level too high and spoiling the peptide; tesamorelin is particularly sensitive to this. FWIW I prefer to use the Hospira version of BAC water that has both 0.9% benzyl alcohol and 0.9% sodium chloride, and mix it 1:1 with 0.6% acetic acid BAC water (Amazon sells Quality Research Chemicals version of this, and it tests ok). That provides a broad spectrum of bacterial protection, and keeps the pH level down below 5 or less for touchy peptides. That still might not be enough for cagrilintide which seems to want pH around 4-4.5 to prevent the formation of amyloid fibrils. Personally I find that risk way too high to try cagri in any form, but I hope this helps in your adventures.

Cagri is fine up to and including pH of 7. The Cagri-Fibril thing turns out to by a myth. It started and spread via rumor only and there is absolutely no empirical evidence to support it. None, nada, zilch.

 

[3Ljeffy]

Cagri is fine up to and including pH of 7. The Cagri-Fibril thing turns out to by a myth. It started and spread via rumor only and there is absolutely no empirical evidence to support it. None, nada, zilch.

https://patents.google.com/patent/T...e * A,control for adults with type 2 diabetes has some discussion of fibril formation (search turns up 18 mentions of fibril) in various solutions/pressure/pH and is apparently the reason for the fancy patented cagri-sema injector. Still might be wrong or not relevant in practice, but it seems not just rumor

 

[Terminalroids]

Won’t the benzyl alcohol in the BAC water kill of the bacteria and viruses?

I always what 10minutes after reconstituting my peptides before injecting to make sure the BA has done its job

I don’t filter and I inject boatload, never have had any bad reaction I could pinpoint to virus/bacteria

 

[ZippityDooDah]

Won’t the benzyl alcohol in the BAC water kill of the bacteria and viruses?

I always what 10minutes after reconstituting my peptides before injecting to make sure the BA has done its job

I don’t filter and I inject boatload, never have had any bad reaction I could pinpoint to virus/bacteria

Bacteriostatic is not the same as bactericidal.

 

[keangkong]

Bacteriostatic is not the same as bactericidal.

Bacteriostatic water will have a hard time killing bacteria. It only contains .9% benzoyl alcohol. That's quite weak. Its purpose is to be strong enough to stop bacterial reproduction while being weak enough that it doesn't cause problems when inside your body. It doesn't work perfectly even in stopping bacterial from reproducing.

 

[keangkong]

Bacteriostatic is not the same as bactericidal.

70% isopropyl rubbing alcohol is bactericidal. That's why you apply it on the outside of the vial. I do know that Janoshik believes that filtering is generally unnecessary.

 

[cgall88]

I just fish my syringe out of the toothbrush cup where I store it between uses, give it a quick rinse to ready it for the next peptide and I'm good to go.

 

[cgall88]

Hey everyone,

I've been diving deep into peptide handling protocols lately and wanted to start a discussion about something that seems simple but could make a huge difference in your research: Do you filter your reconstituted peptides before use, or do you use them as is?

Why This Matters:

For those just getting started with peptides, filtering might seem like an extra, unnecessary step. However, it's actually crucial for several reasons:

Safety First: Unfiltered peptides may contain bacteria, particulate matter, or manufacturing residues that could cause infection, inflammation, or adverse reactions when used in research settings.

Protecting Your Investment: Quality peptides aren't cheap! Using them without proper filtration is like buying premium fuel for your car but pouring it through a dirty funnel. You're compromising what you paid for.

The Real Value:

When you filter your reconstituted peptides through a proper 0.22 μm syringe filter, you're:

Removing potentially harmful bacteria and particles that could cause injection site reactions or infections

Maximizing the purity of your product, which directly translates to more reliable outcomes

Protecting yourself from potential contaminants introduced during manufacturing or shipping

Beginner-Friendly Best Practices:

If you're new to this, here's what you need to know:

What to Buy:

Get sterile 0.22 μm syringe filters (PES/Polyethersulfone filters are best as they don't absorb your peptides)

Make sure you have sterile syringes to use with the filters

Consider the volume you'll be filtering (smaller 4mm filters for under 4ml, larger 13mm filters for more)

Simple Process:

Draw your reconstituted peptide into a sterile syringe

Attach the filter to the syringe

Slowly push the liquid through the filter into your sterile storage vial

Label appropriately with contents and date

Remember that filtering is not just a "nice to have" but a fundamental step that separates proper research protocols from potentially dangerous shortcuts. The small investment in filters (usually $1-2 each) provides enormous value in terms of safety.

Has anyone here experienced noticeable differences between filtered and unfiltered peptides (especially with overseas purchases)? Or perhaps you've always filtered but weren't sure why it matters? I'd love to hear your experiences!

Thank you so much for this tip. Order placed for filters. Appreciate users like yourself that dig into some research to help us all. Top class contribution in my humble opinion. Could I please ask what in your opinion a good fridge life for reconstituted Retatrutide is, ie is 3 months too long

 

[pavlovs]

Thank you so much for this tip. Order placed for filters. Appreciate users like yourself that dig into some research to help us all. Top class contribution in my humble opinion. Could I please ask what in your opinion a good fridge life for reconstituted Retatrutide is, ie is 3 months too long

Twenty-eight days is the general guidance. I go up to six-weeks, I've read others do three months and longer. My opinion is that these meds are cheap, so why take chances? You really have to decide what your own risk tolerance is.

 

[IshimaruKenta]

Never have filtered, and never will. If there's evidence stating that these vials all dangerous and must be filtered, I'll do it. But there isn't any evidence stating otherwise. Extra careful, sure, but ain't nobody's got time for that.

 

[desinr-gal]

70% isopropyl rubbing alcohol is bactericidal. That's why you apply it on the outside of the vial. I do know that Janoshik believes that filtering is generally unnecessary.

Did he?? I dont remember that. I do remember him saying that 10-15% of products tested fail. for one reason or another. There have been many reports of various crap getting into the peptides, And others have said he filters before testing the batches...

 

[basedpepbae]

Did he?? I dont remember that. I do remember him saying that 10-15% of products tested fail. for one reason or another. There have been many reports of various crap getting into the peptides, And others have said he filters before testing the batches...

Filtering in the case of physical particles being in the peps is already worth it to me. Seen too many specs and chunks of “cardboard” in vials not too.

And yes I believe he does filter for all his tests, I remember it being so that it doesn’t damage the machinery. Not sure of his actual stance on filtering though.

 

[deleted.user.18]

Never have filtered, and never will. If there's evidence stating that these vials all dangerous and must be filtered, I'll do it. But there isn't any evidence stating otherwise. Extra careful, sure, but ain't nobody's got time for that.

Costs… $1? Takes 5 min max? Cheap insurance. Maybe it just illusion of control bias. Idk.

 

[deleted.user.18]

Did he?? I dont remember that. I do remember him saying that 10-15% of products tested fail. for one reason or another. There have been many reports of various crap getting into the peptides, And others have said he filters before testing the batches...

Why would he filter before testing? That completely defeats the purpose of purpose of the testing. I have never in my hours of research on janoshik of in my correspondence with the labs heard that stated or implied.