Peptide Critic Community

@rck2 hi thank you for this. I purchased 10 g vials before I saw this on finnrick and got worried about this purchase. Was your test on the same batch as the original that got the C grade.

Hi all- wondering if you can answer this question for me. My sterile vials will not be delivered for another few weeks and I have a single use vial of reta (meaning I have 10 MG vial that I will reconstitute and inject all at once). Can I put the peptide in a syringe and then Add the filter and put a new 5/8 needle in and inject directly with filter on. I understand I have to account for 15 units still in the filter. But are there any issues with doing this? Since I don't have sterile vials for more few weeks and I have a few single use vials I was hoping to do this.

Thank you!

Yes I have been on reta for 6 months from a compounding pharmacy. But this is my first time "researching". I have BAC water scheduled for delivery but it won't be here for another 2-3 weeks. So I may need a single 10 MG dose in the meantime. I have hospira sterile water that can be delivered much sooner so that I can use on a single dose basis. A 10 MG vial that I will use after reconstituting.

Also since this is 1 time use can I inject the peptide while filtering it with out passing it through new vial. If I put into vial after filtering it, it will be immediately drawn out in full. Amd injected so can I skip that step and inject directly from filter with new sterile 5/8 needle

Hey guys quick question. I am new to peptides. If I am Reconstituting a vial of reta with Pfizer Hospira STERILE WATER and it's for a single use- meaning that I'm going to reconstitute it and take the entirety of the dose immediately after (Within the hour or 2 and i plan on filtering) and discard the tiny remainder is that safe and will it work or should I use something else?

@Randy is it 30Ga-1 inch option

I am brand new to peptide world. This is my thinking really looking for guidance here...

I’ve been watching channels like Peptide Critic and Peptide Test, where they filter peptides because the assumption is that some vendors may not be fully trustworthy regarding sterility. But I’m struggling to understand why the filters, used in that process are automatically considered more trustworthy than the original vial itself.

Most of those filters and supplies are also sold as “research use only,” just like many of the peptides. If the concern is that a peptide vendor may not truly be sterile despite claiming sterility or providing a COA, then why should we assume that an independently purchased filter or empty vial is genuinely sterile either?

It also seems like filtering introduces additional opportunities for contamination. Instead of leaving the product sealed in its original vial, the process involves multiple extra handling steps: reconstituting, drawing into a syringe, pushing through a filter, transferring into another vial, and exposing more surfaces and components along the way. Every additional step appears to create another possible contamination point.

So while I understand the argument that filtration could theoretically reduce certain risks, I don’t fully understand how it meaningfully improves safety unless the filters, receiving vials, and entire transfer process are themselves held to a higher and verifiable sterility standard. Otherwise, it feels like the process may simply be shifting the trust problem from one “research-use” product to another while also increasing handling and exposure.

Am I wrong in my thinking? If so, please explain why. Or if you have a trusted brand of filters from a major company (like Hospira BAC water) please let me know.

Thanks everyone!