Doctor's Best NMN 200mg 60 Veggie Caps provides nicotinamide mononucleotide — a direct precursor to NAD+ (nicotinamide adenine dinucleotide), the essential coenzyme that powers cellular energy metabolism and serves as a critical substrate for longevity-associated enzymes including sirtuins and PARPs. NAD+ levels decline significantly with age, contributing to reduced mitochondrial function, reduced DNA repair capacity, and accelerated cellular ageing. NMN directly raises NAD+ levels more efficiently than other precursors.*

• NMN — direct NAD+ precursor with superior cellular uptake*
• Supports mitochondrial energy production and cellular metabolism*
• Activates sirtuins and PARPs for DNA repair and cellular protection*
• Supports healthy ageing at the cellular level*
• 200mg per capsule | 60 capsules — 1–2 month supply
• Non-GMO | Gluten Free | Vegan

Suggested Use: As a dietary supplement, take 1–2 capsules daily, preferably in the morning with or without food.

Frequently Asked Questions

What is NMN and how does it differ from NR (Nicotinamide Riboside)?

Both NMN and NR are NAD+ precursors, but they enter the NAD+ biosynthesis pathway at different points. NR must be converted to NMN before becoming NAD+, while NMN is one step closer to NAD+ in the pathway. Recent research has identified a specific NMN transporter (Slc12a8) in the gut that allows NMN to be absorbed intact and used directly for NAD+ synthesis in certain tissues — suggesting NMN may have more direct cellular delivery advantages compared to NR.*

Why do NAD+ levels decline with age and why does this matter?

NAD+ is consumed as a substrate by sirtuins (SIRT1–7), PARP enzymes (DNA repair), and CD38 (immune signalling). As we age, CD38 activity increases significantly, consuming NAD+ faster than it can be replenished. The result is a substantial decline in NAD+ levels — measured at 50% reduction by age 50 in some tissues. This decline impairs mitochondrial function, reduces DNA repair efficiency, and compromises the ability of cells to maintain themselves — all hallmarks of biological ageing.*

How long does it take to notice results from NMN?

NMN raises blood and tissue NAD+ levels within hours of ingestion. Subjective benefits like increased energy, mental clarity, and improved sleep are often reported within 2–4 weeks of consistent daily use. Longer-term cellular benefits (improved mitochondrial function, DNA repair, metabolic markers) develop over months. Most longevity researchers recommend sustained daily supplementation as part of a broader healthy ageing strategy.*

Can I take NMN with Resveratrol?

Yes — NMN and resveratrol are often combined based on research showing that resveratrol activates SIRT1 (a NAD+-dependent enzyme), while NMN provides the NAD+ substrate that SIRT1 needs to function. The two work synergistically: resveratrol turns the key, and NMN/NAD+ provides the fuel. Doctor's Best also offers Trans-Resveratrol 200 for those who want to build a comprehensive longevity support stack.*