# NAD+

> NAD+ (nicotinamide adenine dinucleotide) is a coenzyme present in every living cell, central to energy metabolism, DNA repair, and cell signaling rather than a peptide in the strict sense. It has become popular in wellness and longevity clinics as an intravenous or injectable therapy intended to restore NAD+ levels that are reported to decline with age. Interest spans metabolic support, cognitive clarity, and general anti-aging protocols, though most available human data come from small, open-label studies rather than large controlled trials. Because NAD+ is a large, charged molecule, absorption and tolerability vary considerably by route of administration. It is frequently discussed alongside precursor compounds such as NMN and NR, which are marketed for raising NAD+ levels through different metabolic pathways.

- URL: https://www.lifeconverted.com/peptides/nad-plus
- Also known as: Nicotinamide Adenine Dinucleotide
- Primary category: Metabolic
- Effectiveness rank: #13 in Immune & Anti-Aging; #8 in Metabolic
- Evidence level: Moderate evidence
- Route: Subcutaneous (Intravenous infusion is also common, especially for higher doses; subcutaneous injection can cause local discomfort due to the compound's low pH.)
- Dose range: 50-200 mg
- Dose tiers: low 50 mg; moderate 100 mg; high 200 mg
- Half-life: Short plasma half-life, roughly under an hour (existing estimates cite about 45 minutes); intracellular NAD+ elevation is reported to persist longer than circulating levels.
- Timing: Morning
- Cycle: Ongoing on, None off (Often given as periodic infusions or injections, such as several times per week or in recurring series, rather than on a fixed on/off cycle.)
- Storage: Refrigerate reconstituted solution at 2-8°C and use within about 2 weeks; protect from light.

## Mechanism of action

NAD+ acts as an electron carrier in mitochondrial oxidative phosphorylation, supporting ATP production, and serves as a required substrate for sirtuins and PARP enzymes involved in DNA repair and gene regulation. Cellular NAD+ pools are reported to decline with age and metabolic stress, which has been proposed to contribute to reduced mitochondrial efficiency over time. Exogenous administration is intended to directly replenish circulating and tissue NAD+, bypassing some rate-limiting steps in endogenous synthesis from dietary precursors.

## Reported benefits

- Supports mitochondrial ATP production as a required metabolic cofactor
- Investigated for roles in DNA repair via PARP and sirtuin pathways
- Studied in early research for markers of cellular and cognitive aging
- Explored anecdotally for reduced fatigue and improved mental clarity

## Reported side effects

- Injection-site burning or discomfort, related to the compound's low pH
- Flushing, nausea, or lightheadedness, more common with rapid IV infusion
- Headache reported at higher doses
- Limited long-term safety data for repeated high-dose protocols

## Common protocols

- Weekly or twice-weekly subcutaneous injection series
- Periodic IV infusion sessions at wellness clinics
- Combined with NAD+ precursors or broader longevity-focused stacks

## Stacking notes

Often paired with NAD+ precursors such as NMN or NR, and with longevity-focused peptides such as Epithalon; data on combined use are limited.

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Educational information only, not medical advice. Full disclaimer: https://www.lifeconverted.com/disclaimer