Metabolic / Anti-aging injectableIVintranasal

NAD+

By Hack SmithLast updated: How we research

Fuels brain cells for mental clarity

Common Uses
  • Cellular Energy
  • Cognitive Function
  • Anti-Aging
Evidence Grade
B — Moderate — Human observational data
Human observational, case study, or open-label trial data available. No RCT data.
Safety Notes

IV infusion commonly causes flushing, chest tightness, and nausea - slower infusion rates typically required Chest tightness during infusion should be carefully monitored to distinguish from cardiac events Long-term safety data from controlled human trials is limited Note: Niacin (nicotinic acid)-specific risks — high-dose hepatotoxicity, elevated uric acid/gout, glucose impairment, and flushing — apply to the nicotinic acid PRECURSOR form of NAD+ support, not to injectable NAD+ or intranasal NAD+ directly

Mechanism of Action

NAD+ (nicotinamide adenine dinucleotide) is a critical coenzyme present in all living cells that serves as an essential electron carrier in cellular energy production through glycolysis, the citric acid cycle, and oxidative phosphorylation. It also functions as a substrate for NAD+-consuming enzymes including sirtuins (SIRT1-7), poly-ADP-ribose polymerases (PARPs), and CD38, which regulate DNA repair, gene expression, cellular stress responses, and metabolic homeostasis. Key Pathways: Sirtuin signaling cascade (particularly SIRT1 and SIRT3-mediated deacetylation), Mitochondrial electron transport chain and ATP synthesis, PINK1/Parkin mitophagy pathway, NAMPT-mediated NAD+ salvage pathway By restoring NAD+ levels that decline with age, supplementation may support mitochondrial function, enhance cellular energy production, and activate sirtuins that regulate metabolic efficiency and stress resistance. Animal studies suggest this translates to improved cardiac function, reduced oxidative damage, and attenuation of age-related cellular decline, though direct human cognitive benefits remain largely theoretical.

Common Dose Reference Ranges

Educational reference ranges only — discuss actual dosing with a qualified healthcare provider.

Low
25
mg
Standard
50
mg
High
100
mg
📖 Used in these guides
⏳ Anti-Aging Guide⚡ Energy & Vitality Guide
📖 Related guides
Mitochondrial Peptides Explained: SS-31, MOTS-C, NAD+ and MoreBest Peptides for Anti-Aging & Longevity: A Ranked GuideBest Peptides for Energy & Vitality: A Ranked Guide

NAD+ calculator

Convert labeled vial mass and an entered water volume using hypothetical arithmetic, not dosing recommendations.

NAD+ reconstitution calculator
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Full NAD+ protocols — frequency, timing, cycle length, reconstitution & research

Frequency: 2-3x weekly
Half-life: 30-60 minutes (plasma NAD+); cellular effects persist longer
Cycle length: 4 weeks
Side Effects
  • Flushing
  • Chest tightness
  • Nausea during IV infusion
  • Headache
  • Fatigue or tiredness
  • Gastrointestinal discomfort
  • Dizziness or lightheadedness
  • Muscle cramping
Compatible Stacks
ResveratrolCoenzyme Q10 (CoQ10)Trimethylglycine (TMG/Betaine)Alpha-Lipoic AcidQuercetin
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