NAD+ IV Therapy: What Science Says, Costs & How to Spot a Good Clinic

Intravenous NAD+ (nicotinamide adenine dinucleotide) is probably the trendiest longevity treatment of 2026. Prices in Spain range from €200 to €800 per infusion, and quality varies enormously.

What NAD+ is, and why it matters

NAD+ is a coenzyme present in every living cell, essential for cellular energy production (ATP), DNA repair, circadian-rhythm regulation, and activation of sirtuins (the so-called 'longevity proteins'). NAD+ levels drop by roughly 50% between ages 40 and 60.

What the science actually says

The evidence is promising but still early. Mouse studies show clear benefits in longevity and metabolic health. In humans there's evidence of elevated blood NAD+ after IV infusion, subjective improvements in energy and mental clarity, and some data on improved inflammatory markers. However: there are NO phase III clinical trials in humans, IV infusion has NOT been proven superior to oral precursors (NMN, NR) across every objective, and long-term effects remain unstudied.

Prices and what justifies them

A 250 mg infusion costs €150–€350, a 500 mg infusion runs €280–€600, and a 1000 mg infusion goes for €500–€800. What justifies the price is NAD+ purity (demand a >99% purity certificate and a GMP supplier), infusion rate (500 mg must be administered over at least 3–4 hours — if they drip it in under an hour, it's dangerous), prior G6PD testing (MANDATORY to prevent hemolysis), and medical supervision throughout the infusion.

Red flags of a low-quality clinic

Be wary if they skip G6PD testing before your first infusion, if a 500 mg infusion lasts under 2 hours, if they can't show you the NAD+ purity certificate, if the 'doctor' supervising isn't a specialist, or if they promise specific outcomes ('roll back 10 years of aging').