However, the authors urge caution in interpreting these findings due to the limited number of trials, the variations in study designs, and the heterogeneity in patient populations and substance types studied
NAD+ NAD+ excels at energy metabolism, making it effective for fatigue and low energy

Published literature: Documented effects on sleep architecture and cortisol modulation in published studies Therapeutic Peptides Comparison Table Peptide Category FDA Status Primary Research Application BPC-157 Tissue Repair Category 1 (2026) Tendon, ligament, GI repair TB-500 Tissue Repair Category 1 (2026) Soft tissue, cell migration Retatrutide Metabolic Phase 3 trials Obesity, metabolic syndrome Tirzepatide Metabolic FDA-approved Type 2 diabetes, obesity Tesamorelin Metabolic / GH FDA-approved Lipodystrophy, visceral fat GHK-Cu Skin / Repair Not approved Wound healing, collagen CJC-1295 GH Secretagogue Category 1 (2026) Growth hormone release Ipamorelin GH Secretagogue Category 1 (2026) Selective GH release Selank Cognitive Category 1 (2026) Anxiety, GABA modulation Semax Cognitive Category 1 (2026) Memory, BDNF pathways KPV Anti-inflammatory Not approved Gut inflammation, skin PT-141 Neurological FDA-approved Sexual health (HSDD) SS-31 Mitochondrial FDA-approved Barth syndrome, mito dysfunction MOTS-c Mitochondrial Not approved Insulin sensitivity, exercise Humanin Cytoprotective Not approved Neuroprotection, aging DSIP Neurological Not approved Sleep regulation 2026 FDA Peptide Reclassification On February 27, 2026, HHS Secretary Robert F

TAC3/TACR3 Mutations Reveal Preferential Activation of Gonadotropin-Releasing Hormone Release by Neurokinin B in Neonatal Life Followed by Reversal in Adulthood