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Conclusion B12 injections offer a scientifically proven solution for addressing widespread deficiency issues that compromise energy, cognitive function, and overall wellness in our modern environment

FDA-approved GLP-1 peptides such as semaglutide and tirzepatide have the strongest safety data, with GoodRx confirming these prescription-only medications are safe and effective when used as directed, a status consistent with the FDA's approval of tirzepatide for chronic weight management

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Retatrutide is an investigational GLP-1, GIP, and glucagon triple receptor agonist currently in Phase 3 trials

This can include decreased stomach acid, which affects absorption, and diets low in animal products or high in processed food

Ethics declarations Competing interests The authors declare no conflict of interest