@aaron.endres's peptide reconstitution tips, fact-checked

What did @aaron.endres actually say?

Aaron walked through how to reconstitute what he calls "redder" — a thinly veiled reference to retatrutide — using bacteriostatic water and an insulin syringe. His core instructions: pull 100 units of bac water into a 100-unit insulin syringe, inject it slowly down the side of the vial, rotate gently rather than shaking, and then calculate doses as 20 units per milligram from a 5mg vial. He also plugged Nova Peptides as his sourcing choice, calling them his "trusted source."

The video has 1.2 million views. That reach matters here, because retatrutide is not approved by the FDA, is not legally available by prescription in the United States, and the people watching this are almost certainly self-administering a research compound without medical supervision.

Does the science back this up?

The reconstitution technique itself is largely sound. The math, however, has a significant error that could lead to serious dosing mistakes. Retatrutide (LY3437943) is a triple GIP/GLP-1/glucagon receptor agonist that showed meaningful weight loss in Phase 2 trials, but it is still in clinical development.

The Jastreboff et al. 2023 study published in the New England Journal of Medicine tested retatrutide doses between 1mg and 12mg weekly in people with obesity. The drug produced dose-dependent weight loss but also dose-dependent GI side effects including nausea, vomiting, and diarrhea. In that trial, doses were titrated slowly by trained clinicians over many weeks. There is no published data on the safety profile of self-administered compounded retatrutide outside of controlled clinical settings, and that gap is not a small one.

What did they get wrong (or right)?

Credit where it is due: injecting bac water down the side of the vial rather than directly into the powder is standard reconstitution practice and reduces the chance of protein degradation. Gentle rotation over shaking is also correct. Alcohol swabbing both stoppers is basic sterile technique that many amateur reconstitution videos skip entirely.

Here is what he got wrong, and it matters. He says "one milligram is 22 milligrams will be 40 units." That sentence is incoherent, but if you follow his logic: 100 units of bac water into a 5mg vial means each milligram equals 20 units. That math actually checks out for 20 units per milligram. But then he says "2 milligrams will be 40 units" in a garbled way that could easily be misread. Anyone who miscalculates concentration here is not off by 10 percent, they could be injecting a multiple of their intended dose. At retatrutide's potency range, that is a meaningful clinical risk.

His sourcing plug for "Nova Papsler" (Nova Peptides) is unverified by any independent third-party analysis presented in this video. He says he "trusted the third party company" and vaguely references seeing lab results online. That is not the same as independently verified certificate of analysis data.

What should you actually know?

Retatrutide is not FDA-approved. It is not legally dispensed as a prescription compound in the United States. Purchasing it from peptide vendors means you are buying an unregulated research chemical with no guaranteed purity, sterility, or concentration accuracy. The Phase 2 data from Jastreboff et al. is genuinely compelling — up to 24 percent body weight reduction at 48 weeks in some dose groups — but that trial used pharmaceutical-grade drug with medical oversight and a slow titration schedule.

Self-injection of a GIP/GLP-1/glucagon agonist without baseline labs, without cardiovascular screening, and without a titration protocol is not the same thing as participating in a clinical trial. Pancreatitis, tachycardia, and severe GI events were among the adverse effects noted in the Phase 2 data. None of that is mentioned in a 60-second reconstitution TikTok reaching 1.2 million people.

If you are interested in GLP-1 class therapy for weight management, a regulated telehealth provider can evaluate whether FDA-approved options like semaglutide or tirzepatide are appropriate for your situation, with actual medical oversight.