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Statistical analyses Statistical analyses were performed using SAS 9.13 (SAS Institute, Cary, NC)

The FDA itself is explicit that compounded drugs are not FDA-approved, and that it does not review compounded formulations for safety, effectiveness, or manufacturing quality before they reach a patient

The research-grade blend supplied by Koi Peptides is synthesized independently for in vitro laboratory research only not formulated, packaged, or labeled for human use, not equivalent to or a substitute for any approved drug product, and not authorized for any human or veterinary indication

Lasting tiredness can have many causes beyond B12, such as iron levels, thyroid issues, or sleep problems, and a check-in helps make sure you are treating the right thing

Figures S4 and S5 show networks of routes of administration for secondary outcomes