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We clarify that we did not propose to amend 424.27 for comprehensive outpatient rehabilitation facilities (CORFs) physical therapy, occupational therapy, and speech-language pathology treatment plans to align with our proposed amendments at 424.24 because section 1861(cc) of the Act and regulation at 42 CFR 410.105(c) require these treatment plans to be established by a physician

Food and Drug Administration (FDA) for medical use in humans

To prove that these vitamins directly cause cancer, an experimental design such as a randomised controlled trial would be needed

Rather than directly supplying NAD+ precursors (like NMN or NR), it works by blocking an enzyme that consumes nicotinamide, theoretically preserving the substrate pool for endogenous NAD+ production