Frequently Asked Questions
NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme present in every cell, essential for energy metabolism, DNA repair, and the activity of sirtuins (longevity-linked proteins). NAD+ levels decline by approximately 50% between ages 40 and 60 due to increased consumption by DNA repair enzymes and reduced biosynthesis.
NAD+ is required by the mitochondria to convert nutrients (glucose, fatty acids) into ATP — cellular energy. When NAD+ is depleted, mitochondrial efficiency drops, causing fatigue, brain fog, and reduced physical capacity. Restoring NAD+ levels reverses many of these symptoms.
Direct NAD+ has low oral bioavailability — it struggles to cross cell membranes intact. Precursors like NMN (Nicotinamide Mononucleotide) and NR (Nicotinamide Riboside) are better absorbed and efficiently converted to NAD+ inside cells. The 500mg formulation in Supplement Labs' product is designed for effective delivery.
People over 40, those experiencing chronic fatigue, high-stress professionals, athletes wanting improved recovery, and anyone focused on longevity and healthy ageing benefit most. It is also studied for neuroprotection, metabolic health, and cardiovascular function.
Some users notice improved energy and mental clarity within 1–2 weeks. More significant cellular repair and metabolic improvements develop over 4–8 weeks. For longevity-related benefits, consistent long-term use is the approach — this is not a quick-fix supplement.

Product Specifications