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Penick SB, Hinkle LE Jr

Gastroscopy (a camera into the stomach) Tests for coeliac disease (an auto-immune disease that makes people allergic to gluten and reduces their absorption of a lot of nutrients)

Circulating microRNAs and cytokines as prognostic biomarkers for doxorubicin-induced cardiac injury and for evaluating the effectiveness of an exercise intervention

NAD+ is not a peptide, the phrase NAD peptide is a marketing label rather than a molecule, and the two therapies are built for different jobs: NAD+ as a systemic energy and repair foundation, peptides as targeted signals for repair, skin quality, and recovery

The total human evidence base, as of this writing, consists of the following: 1) a Phase I safety trial of 42 healthy volunteers that was registered in 2015, canceled in 2016, and never published, 2) a retrospective case series of 12 patients with knee pain, no control group, and no validated outcome measure, and 3) a 2025 pilot safety study involving two healthy adults who received intravenous infusions at a single private clinic in Florida