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Reported and plausible concerns with injectable use include injection-site reactions (pain, redness, swelling, bruising, or nodules), infection risk from non-sterile technique or unverified product, and unpredictable copper exposure when the skin barrier is bypassed

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Modulation of Glucose Production by Central Insulin Requires IGF-1 Receptors in AgRP [PMID: 34285117] Laboratory literature summary: Modulation of Glucose Production by Central Insulin Requires IGF-1 Receptors in AgRP Neurons

Impact on Compounding Pharmacies and 503B Outsourcing Facilities For compounding pharmacies and 503B outsourcing facilities, the FDAs decision means they will no longer be permitted to produce injectable semaglutide under the shortage exception