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What the Evidence Shows and What It Does Not MedicalDaily Evidence Check Data source: Multiple peer-reviewed studies published 2025-2026, including British Journal of Pharmacology, Nature Reviews Endocrinology, and body composition literature on STEP and SURMOUNT trial data Key finding: Up to 40% of weight lost on high-efficacy GLP-1 drugs is lean body mass

People who are pregnant or breastfeeding should avoid both drugs because they may harm the fetus and its unclear how much of the drugs are passed through breast milk

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All respondents are AgelessRx Glutathione Nasal Spray customers who were approved for a prescription after completing an assessment with a medical provider