The fatigue of perimenopause isn't just hormonal. Part of it happens at a cellular level — in the mitochondria, the energy-producing structures inside every cell in your body. As you age through perimenopause and beyond, levels of NAD+ (nicotinamide adenine dinucleotide) — a coenzyme central to how your cells produce and use energy — decline significantly. Less NAD+ means less cellular energy, slower DNA repair, reduced mitochondrial efficiency, and a compounding effect on how resilient your body feels day to day. NMN (Nicotinamide Mononucleotide) is the most researched and bioavailable oral precursor to NAD+. Taking NMN supports your body's ability to maintain NAD+ levels — addressing the cellular energy decline that underlies much of the fatigue, brain fog, and reduced physical resilience associated with ageing through perimenopause and beyond. IsoWhey Women's Health NMN uses CellVive NMN — a quality-standardised branded ingredient — providing 500mg of NMN per 5g daily scoop. Unflavoured oral powder, mixes easily into water or any cold drink. What's in each serve Ingredient Per serve What it does CellVive NMN (Nicotinamide Mononucleotide) 500mg Supports NAD+ levels; supports cellular energy metabolism and mitochondrial function