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Researchers see sterile water, normal saline, and bacteriostatic water on the shelf and wonder if they are interchangeable
None of these substitute for medication, but they have legitimate places in a broader metabolic health plan
Last reviewed: May 31, 2026 Last updated: May 31, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
GLP-1 medications affect more than just your weight
Tirzepatide is FDA-approved for weight loss under the brand name Zepbound, while Retatrutide is still in clinical trials and not yet available on the market
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