NAD+ (Biofermented): The Good, The Bad & The Research
NAD+ declines up to 80% with age. Learn the difference between biofermented and synthetic NAD+, and why it matters for research purity. BetterBio Synthesis carries biofermented NAD+ — third-party tested every batch.
Jun 16, 2026 | 10 min read
What Is NAD+?
NAD+ stands for Nicotinamide Adenine Dinucleotide — a coenzyme found in every living cell and involved in hundreds of metabolic reactions. Unlike SS-31 or MOTS-C, which are peptides, NAD+ is a small molecule coenzyme that functions as an essential carrier in the energy production process.
NAD+ exists in two forms: the oxidized form (NAD+) and the reduced form (NADH). This cycling between NAD+ and NADH is fundamental to how cells generate energy — it is the mechanism by which electrons are transferred through the mitochondrial electron transport chain to produce ATP.
Beyond energy production, NAD+ serves as a required cofactor for three critical classes of enzymes:
• Sirtuins (SIRTs) — key regulators of aging, DNA repair, inflammation, and metabolic health
• PARPs (Poly-ADP-ribose polymerases) — central to DNA damage repair
• CD38 — an enzyme involved in immune function and calcium signaling
One of the most well-documented findings in aging biology is that NAD+ levels decline significantly with age — by some estimates up to 80% between youth and old age. This decline has been identified as a driver of mitochondrial dysfunction, metabolic slowdown, DNA repair deficits, chronic inflammation, and stem cell fatigue.
