NAD (nicotinamide adenine dinucleotide) injections deliver a concentrated form of a coenzyme that plays a central role in cellular energy production and metabolic processes. Providers use NAD injections in medical and wellness settings to support several potential benefits; evidence varies by indication and more research is ongoing.

What NAD is and how it works

• NAD is a coenzyme present in every cell; it facilitates redox reactions in mitochondria, helping convert nutrients into ATP (cellular energy).

• NAD is also involved in DNA repair, regulation of gene expression (through sirtuins), cell signaling, and maintaining cellular health.

• Levels of NAD naturally decline with age and under conditions of stress, chronic illness, heavy alcohol use, and poor sleep or nutrition.

Common uses and claimed benefits of NAD injections

• Increased cellular energy and reduced fatigue: People report higher energy, improved stamina, and less mental fatigue after NAD therapy, likely related to restored mitochondrial function.

• Cognitive support and mental clarity: Some patients experience improved focus, concentration, and mood. NAD may support neuronal function and neurotransmitter balance.

• Anti-aging and cellular repair: Because NAD supports DNA repair enzymes (sirtuins and PARPs), it is promoted for cellular maintenance and age-related decline. Human data on long-term anti-aging effects are not definitive.

• Athletic recovery and performance: Some athletes use NAD for faster recovery, reduced muscle fatigue, and improved endurance, though robust clinical proof is limited.

• Mood regulation and psychiatric symptoms: Anecdotal and preliminary reports suggest improvements in anxiety or depressive symptoms for some patients, but NAD should not replace evidence-based psychiatric care.