NAD Supplementation in mg

NAD⁺ supplementation: dosage, bioavailability & clinical context

Nicotinamide adenine dinucleotide (NAD⁺) is an essential coenzyme present in every living cell, involved in energy metabolism, DNA repair (PARPs) and sirtuin signaling. Cellular NAD⁺ levels decline measurably with age. This calculator estimates a daily oral target using dose_mg = weight_kg × factor_mg_per_kg; the default 3.5 mg/kg yields ~245 mg/day for a 70 kg adult.

A key caveat: oral NAD⁺ itself has low bioavailability — the molecule is broken down before absorption. Precursors such as NMN and NR (nicotinamide riboside) are usually preferred for raising intracellular NAD⁺. For more dramatic repletion, some clinics offer IV NAD⁺ infusions (US$200–500 per session, 250–1000 mg over hours). Clinical research is exploring NAD⁺ in neurodegenerative diseases (Parkinson’s, Alzheimer’s) and metabolic dysfunction, but evidence is still preliminary.

Applications

Useful for individuals considering oral NAD⁺ or its precursors, longevity-clinic patients planning IV protocols, and clinicians estimating equivalent dosages across body weights. Medical disclaimer: this is educational only. Discuss any supplementation with a licensed healthcare provider, especially if you have cancer history, take medications, or are pregnant.

FAQ

Why is oral NAD⁺ often considered inefficient? NAD⁺ is a large, charged molecule that is degraded in the gut. Most of an oral dose is hydrolyzed before it reaches cells, which is why precursors like NMN/NR are usually recommended for systemic effect.

Are IV NAD⁺ infusions worth the cost? Evidence is limited. They reliably raise plasma NAD⁺ short-term, but long-term clinical benefit for healthy adults has not been demonstrated in controlled trials.

Is there a regulatory body endorsing NAD⁺ for anti-aging? No. Neither FDA nor ANVISA has approved NAD⁺ or its precursors as anti-aging therapies. Off-label clinical use exists in select neurodegeneration research protocols.