Peptide Guides: Injection Sites, Reconstitution, Storage, and Basics

Which peptide guide should I read first?

Start with the guide that matches the question in front of you. If the word peptide is new, read what peptides are first. It uses the National Human Genome Research Institute definition, a short chain of amino acids, typically 2 to 50, joined by peptide bonds, and it separates approved medicines such as Ozempic from products that have no FDA approval.^[4] If you are asking how to mix a dry vial, read the reconstitution guide, then the bacteriostatic water guide for the diluent. If you are asking how long something keeps, read the storage guide, which lines up label limits for several products. If you are asking where on the body an injection goes, read the injection sites guide, which compares the abdomen, thigh, and upper arm named on the Ozempic label.^[1] Every guide ends with its sources, so you can check each claim yourself.

I am asking what a peptide is

Read What are peptides?.

I am asking how to mix a vial

Read How to reconstitute peptides, then Bacteriostatic water.

I am asking how long something lasts

Read How to store peptides.

I am asking where to inject

Read Peptide injection sites.

What does each PepTrac peptide guide cover and cite?

There are five guides, and each one is built on named primary sources instead of opinion. The injection sites guide compares three FDA drug labels, the Ozempic, Wegovy, and Zepbound prescribing information on DailyMed, and adds a 2016 consensus paper on injection technique from Mayo Clinic Proceedings. The reconstitution guide works through the arithmetic and draws its technique steps from the Egrifta WR label, an FDA-approved peptide that ships as a powder. The bacteriostatic water guide rests on the manufacturer label and the CDC rule for opened multi-dose vials.^[2] The storage guide sets four product labels side by side and says plainly where no label exists. The basics guide uses the NIH glossary and FDA pages.^[4] Because many research peptides have no FDA label, the guides state when a figure is not established and leave the number out rather than guess.^[3]

How are PepTrac guides researched and sourced?

Guides are written by the PepTrac Editorial Team from primary sources first. That means FDA-approved prescribing information on DailyMed, pages from the FDA and CDC, and peer-reviewed studies found through PubMed. Marketing pages from peptide sellers are never used as evidence. Each factual sentence carries a numbered citation that links to the source list at the bottom of the page, and each source shows the date we last opened it. Every page shows a published date and an updated date, and the updated date changes only when the content changes. No medical professional reviews these pages, and we do not claim one does. If you find a mistake, email team@peptrac.app and we will check it against the source. The full process, including how we handle thin evidence, is on the editorial policy page. The CDC page on safe injection practice is a typical example of the sources used.^[2]

Do these peptide guides give dosing or medical advice?

No. The guides explain technique and arithmetic, then point you to the product label, your pharmacist, and your prescriber. They never tell you what to take, how much, or how often. Worked examples are labeled as arithmetic, not as suggested doses. An important reason is that many peptides sold online for research are not FDA-approved. The FDA says compounded drugs are not FDA-approved and that it does not review them for safety, effectiveness, or quality, and it has warned about products falsely labeled for research purposes.^[3] The FDA has also listed safety concerns for BPC-157 in compounding, including possible immunogenicity and peptide-related impurities.^[5] An FDA-approved product comes with its own label, and that label always outranks a general guide like this one. When your label and a PepTrac page disagree, follow the label and ask your pharmacist.

What is the difference between a guide, a calculator, and a tracker?

A guide explains. It is a written page with sources, such as how reconstitution works or what the label says about storage. A calculator is a free web tool that does one piece of arithmetic on numbers you type in, such as turning vial milligrams and water milliliters into syringe units. It needs no account and never picks a dose. A tracker is the PepTrac iPhone app, which keeps your own record over time. In the app, the Track tab shows each vial's fill level and days left, the Calculator tab works out syringe units, and you record an injection site with each logged dose. PepTrac is a free download with an optional PepTrac Pro subscription, it is published by Blanket LLC, and it does not sell peptides. All of these tools are educational record-keeping, not medical advice.^[1]