# University of Utah: compounded GLP-1 injections in Nebraska often contain added ingredients

- Published: 2026-11-14 22:26 UTC
- Section: Life & Health › Medicine
- Tags: compounded GLP-1, weight-loss injections, University of Utah study, JAMA 2026, Nebraska prescription records, vitamin B12 injections, levocarnitine, drug safety oversight
- URL: https://realtech.media/news/rt-a47ffcac87563ed45a4ff281_university_of_utah/

**A JAMA study of Nebraska prescription records found that compounded GLP-1 weight-loss injections often contain added substances whose safety with the main drug is not established.**

![University of Utah: compounded GLP-1 injections in Nebraska often contain added ingredients](https://realtech.media/media/2026/11/9401414e7791ffbd.jpg)
*Roche-Organon, Inc, Wikimedia Commons, CC BY 4.0*

Researchers at the University of Utah report that weight-loss injections prepared by specialist pharmacies may contain extra ingredients whose safety alongside the main drug has not been established, according to knowridge.com. [1] The study was published in JAMA in November 2026. It used Nebraska prescription-tracking records to assess how often compounded GLP-1 medicines were supplied and what they contained. [1]

GLP-1 drugs copy a natural hormone that helps control appetite and blood sugar, and approved versions are widely used for diabetes and weight management. Compounding means a pharmacy prepares a medicine for a particular need instead of supplying a standard manufactured product. Such preparations can serve patients who need a different formulation, but they do not go through the same approval process as commercially approved medicines.

## Prescription data from Nebraska

The records showed compounded GLP-1 prescriptions rising from none in 2018 to 86% of all compounded weight-loss prescriptions in the state in 2025. [1] This percentage refers to compounded weight-loss prescriptions, not to all weight-loss drugs or all GLP-1 prescriptions.

Many of the products included added substances, particularly forms of vitamin B12. Another common ingredient was levocarnitine, which helps the body use energy from fats. [1]

## Added ingredients and open questions

These extras are sometimes promoted as ways to ease unwanted effects of the injections. The researchers found little evidence that they provide such benefits, and the combinations have not been adequately tested for safety. [1] The amount, preparation and interaction with other ingredients can matter, especially when a product is injected.

The authors also noted that many patients buy compounded products online and pay directly. Their use may therefore be missing from the insurance-based records that doctors and scientists commonly examine. [1]

The study describes dispensing patterns in one US state. It did not follow patients to measure side effects or compare health outcomes, and it does not show that every compounded injection is harmful. The researchers say doctors should ask specifically about compounded injections and patients should check exactly what their medicine contains. They add that wider monitoring and direct safety studies are needed.

## Sources

1. [knowridge.com](https://knowridge.com/2026/11/weight-loss-injections-may-contain-untested-vitamin-mixtures)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-a47ffcac87563ed45a4ff281_university_of_utah/