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Sterile Filtering Methods Necessity and Limitations for Storage

111 replies42 peopleJun 8, 2026ā˜† Follow
Summary

what practical methods exist for filtering liquids and whether it is necessary or beneficial for safety and storage

What this discussion establishesWhere people disagree

whether filtering improves overall safety or mainly creates new risks compared with skipping it

Nothing here is advice.

111 replies Ā· 42 people Ā· page 1 of 3
KeenAlder11archiveopening postJun 8

I've avoided trying filters altogether so far. My close contacts also steer clear and aren't interested at all. Could they end up being unnecessary expenses? I'd like to hear the benefits and downsides of going with them.

SlowTimber66archiveJun 8

The upside stays minimal added cost or work on my end. It blocks microbes plus assorted stray bits from outside so the odds drop sharply. No real downsides come up.

PatientTimber12archiveJun 8

Agreeing with that point from before. Using filters means paying extra for supplies and probably sacrificing a small amount of the product. On the positive side, it removes any microbes or contaminants that might be present in the container. Personally, I'd choose to buy the filter instead of facing medical expenses due to an infection. That's just how I see it, though, and I don't criticize people who skip it.

KeenAlder11archiveJun 8
↳ replying to @PatientTimber12

I mix it up first then pull the liquid through a filter and move it all over to another clean sealed container.

PlainAlder11archiveJun 8

Yes handling a couple of those containers adds five to ten minutes to the whole procedure for me. Before coming across additional information I skipped that step entirely. What I require are some filters together with needles that lock via luer connection specifically needing one at least an inch and a half long in a larger diameter and the twenty three gauge happens to be what I already have. For the injection devices I currently own both the three milliliter size and the five milligram size that also use luer locking.

PlainLedger95archiveJun 8
↳ replying to @KeenAlder11

I got some good ideas from a clip on how to separate stuff. It seemed simple, inexpensive, and quick with basically no problems at all.

PlainTimber26archiveJun 8

Testing and filtering really appeal to me since that's something within my power to manage. Even though it's not perfect the minor extra expense brings me greater calm personally speaking.

KeenAlder11archiveJun 8
↳ replying to @PlainLedger95

Appreciate the clip and the details posted here. Also grateful to the other contributor.

GreyThistle19archiveJun 8

From what I've seen, going through the filtration process means spending a little more but it prevents a ton of trouble later on. Still, I believe a quick note is needed. I'm not suggesting this is your situation, but plenty of folks mention filtering to skip issues with endotoxins, though filters do nothing to stop them. The toxins just make it past anyway.

PlainAlder11archiveJun 8

Mistake, I fixed it. Delete that out of your post please.

LevelAlder29archiveJun 8

Being pretty inexperienced here, filtering doesn't seem to have any negatives because each one is cheap and quick to do. Also, equipment really appeals to me, especially stuff from labs. It makes me feel like I'm some kind of crazy inventor!

PlainAlder11archiveJun 8
↳ replying to @LevelAlder29

You can get a pack of those filters reasonably, plus shipping.

KeenAlder11archiveJun 8
↳ replying to @GreyThistle19

I figure the filter won't do anything about endotoxins and mainly targets bacteria instead.

WarmMeadow92archiveJun 8
↳ replying to @LevelAlder29

To offer a counterpoint though I support the idea of filtering for the sake of discussion there's a potential issue with adding impurities right in the filtering step. Assuming the dried powder container and what's inside start out clean mixing straight in that container might be preferable. Effective filtration demands clean equipment and careful sterile procedures which involve many uncertainties. Consider how certain medications come in dried form and get mixed by users without extra steps because they're made under controlled conditions. Given that we can't verify cleanliness here many choose to filter anyway. Still I see the perspective of those who skip it and hold no negative opinion toward them. Our group rarely checks for sterility often just one or two containers which isn't sufficient for solid info. I choose to filter each one myself yet recognize the reasons others skip it.

LevelAlder29archiveJun 8
↳ replying to @WarmMeadow92

Those observations make sense, and that fact was news to me. I'm considering returning to my earlier work with bacterial cultures by performing my own checks for cleanliness using plates. This isn't to obtain conclusive data, however, it's simply due to my fondness for equipment and experimentation. I admit I'm being over the top with this šŸ˜†šŸ¤“šŸ”¬šŸ’‰

GreyThistle19archiveJun 8
↳ replying to @KeenAlder11

After the peptides get freeze-dried into the bottle, endotoxins can't be taken out anymore. The heat required for that would destroy the peptides too. They really need to be clean from the start at the manufacturing place, since nothing works after that.

GreyLantern40archiveJun 8
↳ replying to @GreyThistle19

Another option involves filters that carry a positive charge. From what I've come across in a few discussions, the peptide ends up getting caught in them, rendering the approach ineffective just as the heating technique does.

BlueAlder28archiveJun 9
↳ replying to @KeenAlder11

I attach the filter only once the mixed peptide is already in the syringe from the initial needle. I swap that needle out for the filter plus a fresh one and then push everything into a clean vial or pen cartridge. After pulling the syringe away I load a little air and force it across the filter to move more of the solution through. Using extra water for a rinse would need still another needle and the added amount recovered is tiny by then. Creating suction with a filter is basically impossible and serves no purpose anyway. The parts stay inexpensive in larger quantities and the cartridge itself does not factor in when using pens.

ClearCinder63archiveJun 9

Every time I prepare a solution I pass it through a filter first. Lately I've stopped sending samples for analysis on a regular basis because the outcomes have always been positive so far. This step reduces my overall chance of issues. It won't get rid of any bacterial remnants but at least ensures the product stays free of contaminants and the extra effort doesn't raise my expenses in any meaningful way.

WarmMeadow92archiveJun 9
↳ replying to @LevelAlder29

Doing your own check on whether something stays sterile seems pretty cool in my opinion. Agar plates aren't required at all from what I can tell. Putting the sample straight into growth liquid looks simpler to carry out with a basic home setup. That approach means placing the substance into containers of broth, holding them steady at the right heat level, and watching whether they turn cloudy after a while. The whole project comes across as really enjoyable.

LevelTimber64archiveJun 9
↳ replying to @KeenAlder11

I mix up the powder first and pull it into the syringe. After that I swap the needle for the filter and fit a fresh one on the end. I push the contents into a vial that's been cleaned and sterilized with no pyrogens remaining. Adding a vent needle can help too. For the smaller filter I run a little bac water through afterward to move any trapped solution across.

LevelAlder29archiveJun 9
↳ replying to @WarmMeadow92

I sure wish I could add an animated picture to my comment because the one I'd pick shows Mr. Burns uttering excellent with a grin.

WryCinder14archiveJun 9
↳ replying to @WarmMeadow92

Hold up, is the idea to skip any filtering on tesa?

IronLantern24archiveJun 9

I set aside roughly ten units from the two milliliters of bacteriostatic water that goes into mixing. Before putting the mixed solution into the fresh container, I run five units through the filter first. The last five units then get pushed through to clean it out. This way it seems like less of the compound gets lost, even though one syringe ends up being thrown away. For me the expense doesn't matter much compared to keeping impurities out of the injection.

WarmMeadow92archiveJun 9
↳ replying to @WryCinder14

Obtaining it through a pharmacy changes things. This compound has official approval unlike most others in its category and arrives in freeze dried containers. Filtering becomes unnecessary in that case. Sourcing from alternative origins however calls for using a filter. The instructions for preparation appear on the second page of the official document.

WryCinder14archiveJun 9
↳ replying to @WarmMeadow92

Got it, that explanation helped. I began tesa yesterday evening and it's extremely intense šŸ˜‚

WarmQuill56archiveJun 9

Been at it only a short time, about two months. Tests came back fine, but two batches weren't sterile. I'll filter from now on. It's a bargain for the peace of mind.

GreyAlder39archiveJun 9
↳ replying to @LevelAlder29

I also looked into that option, yet it seems rather involved since you'd need multiple growth substances, and oxygen-free microbes get left out. Official guidelines exist for this, but they become trickier when working in a small setup. Did you come up with any detailed method?

CopperAlder51archiveJun 9

Even more causes for sifting further down exist. Based on the agency during its former condition.

PatientSparrow35archiveJun 9

This is literally my first time working with peptides, just started today. I spent a long stretch going through studies, online threads, clips, and all the precautions I could find before choosing to try a filter. I get that some uncertainty always comes with getting these research compounds, yet I still wanted to stack on as many precautions as possible. It's not that I expect issues, more that the extra step gives me added security and calm. Those filters don't cost much, and if they might catch any bits or lower the odds even a little, it seems worth doing. In the end it's still a chance, but I'd rather use every option than skip one and later regret it.

LevelAlder29archiveJun 9
↳ replying to @GreyAlder39

So far I haven't explored this area much, though I picked up a useful suggestion on fluid growth medium in this discussion. I'm considering placing some in a small container while trying to preserve partial vacuum or just topping it right up to the sealable lid, which might suit testing without oxygen. Plates with agar or blood versions are inexpensive and straightforward to find. A tube warmer could also prove useful at some point. A decade has passed since my microbiology studies, which I really enjoyed at the time, but advanced schooling pushed most of it aside, assuming the mind works like a space with limited room as the old stories suggest.

GreyAlder39archiveJun 9

Working with a liquid setup inside a small container seems smart to me. You'd likely need some kind of optical measuring device for that. My old papers from microbio class and that fly-counting credential predate your time here by a lot. Still, those aGLP-1 compounds brought back the sharp thinking from when I was younger. Things feel simple and fun once more. The mind palace approach strikes me as more appealing. šŸ˜Ž

WarmSparrow60archiveJun 9
↳ replying to @WryCinder14

My stomach got covered in sore bumps and redness after a while. Following seven days I moved over to the rear area instead and have stuck with it since.

WarmSparrow60archiveJun 9

I purchased a complete filtration system for backup protection but haven't activated it yet. My tolerance for uncertainty exceeds that of the average person. Whenever a container appears or feels off, I discard it, though this has happened just a handful of occasions and only with individual units rather than entire sets. Since entering this gray phase, I've become far more aware and consume the containers at a faster rate as I manage the schedule myself. It's unlikely I'll ever tap into my accumulated supply from the remote medical service, given that portions are nearing eight to twelve months old, and I've learned about breakdown over time even with the additives used by compounding pharmacies. It turned out to be quite a costly experience.

WarmHarbour28archiveJun 9

I wonder if folks realize filtering got started due to those glass containers. People ought to consider the dimensions of the molecules they hope to remove. It helps to examine what pore dimensions filters come in. How pure is the space or enclosure where this happens?

WarmMeadow92archiveJun 9
↳ replying to @WarmSparrow60

I've taken shots from batches even after their dates expired and never ran into trouble. Lately I injected some material that had been sitting around for a long time. My supply is nearly gone but I keep using what's left.

WarmMeadow92archiveJun 9

I really enjoyed that particular product. Felt bad finishing the final vial. It seemed like the end of a special time. Dropped a lot of weight with it. It was the first one in the compounded area.

GreenSignal63archiveJun 9

When it comes to the vials used for putting the filtered material back in, does anyone sterilize those themselves or just assume the bought ones are already sterile?

PatientTimber45archiveJun 9

A simple no would be enough. Playing the peptide game is fine.

CopperPebble16archiveJun 9
↳ replying to @GreyThistle19

Bacteria will not pass but other issues remain. Endotoxin poses less danger than repeated shots of various contaminants, bacteria, clumps, and particles from glass or plastics. Or just rely on the ethics of those running unlicensed labs overseas.

WarmHarbour28archiveJun 9
↳ replying to @WarmMeadow92

What did you think of the other pharmacy option? I forget the strength, maybe five or ten milligrams. It was basically useless.

WarmMeadow92archiveJun 9
↳ replying to @WarmHarbour28

Not my top choice but I took twenty milligrams last Saturday and it feels decent this week. Many others say it seems weak though. The strength is so low I had to inject one hundred thirty five units.

WryCinder14archiveJun 9
↳ replying to @WarmSparrow60

I'm more of a rear guy myself, might switch too.

SharpTimber80archiveJun 9

I just began filtering. I assume the vials bought are sterile. Watch out if buying from online marketplaces.

WarmAlder42archiveJun 9
↳ replying to @LevelTimber64

That was the clearest and simplest set of steps for filtering I've come across. Thanks.

PlainAlder11archiveJun 9
↳ replying to @GreenSignal63

I say they are sterile when bought. No idea if true but no problems so far.

ClearWillow59archiveJun 10
↳ replying to @KeenAlder11

Look up filtering discussions here for detailed steps and talks. Videos online also show the process clearly. Some have seen unknown bits floating in their material besides bacteria concerns that some dismiss. Preferring caution over risk and it feels like doing lab work. Supply sellers offer kits for the whole thing.

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