NMN / NAD+ Precursors

What is NAD+?

• Nicotinamide adenine dinucleotide - essential coenzyme in all cells
• Critical for energy metabolism (ATP production)
• Required for sirtuin activation (longevity genes)
• Necessary for PARP enzymes (DNA repair)
• Declines 50%+ from age 20 to 60

Precursors:

• NMN (Nicotinamide Mononucleotide): Direct NAD+ precursor, one enzymatic step away
• NR (Nicotinamide Riboside): Requires two steps to become NAD+, more research history
• Niacin/Niacinamide: Older forms, less efficient, can cause flushing

Key studies:

• Yoshino et al. (2021): 250mg NMN improved muscle insulin sensitivity in prediabetic women
• Martens et al. (2018): NR increased NAD+ levels and reduced blood pressure in older adults
• Igarashi et al. (2022): NMN improved gait speed and grip strength in older men

Mechanisms:

• Replenishes declining NAD+ pools
• Activates sirtuins (SIRT1-7) - longevity and metabolism regulators
• Supports mitochondrial function
• Enhances DNA repair capacity
• May improve vascular function

Limitations:

• Most impressive data is from animal studies
• Long-term human safety data limited
• Optimal dosing not established
• Expensive compared to many supplements
• Some debate about absorption and bioavailability

NMN Protocol:

• Starting dose: 250mg/day
• Common dose: 500-1,000mg/day
• Advanced: Up to 1,500mg/day (used by some researchers)
• Timing: Morning preferred (may boost energy)
• With or without food (sublingual may improve absorption)

NR (Nicotinamide Riboside) Protocol:

• Starting dose: 250mg/day
• Common dose: 300-500mg/day
• Maximum studied: 1,000mg/day
• Timing: Morning or split AM/PM

Form considerations:

Stacking (David Sinclair's reported protocol):

• NMN: 1,000mg morning
• Resveratrol: 1,000mg with yogurt (fat for absorption)
• Metformin: 1,000mg (prescription, evening)
• Note: This is his personal protocol, not medical advice

Common mistakes:

• Starting too high (start low, assess tolerance)
• Expecting immediate dramatic effects
• Poor storage (NMN degrades with heat/moisture)
• Not tracking any biomarkers

Known risks:

• Generally well-tolerated in studies
• Mild GI upset possible
• Flushing (more common with niacin forms)
• Headache in some users

Theoretical concerns:

• Could potentially feed cancer cells (they also need NAD+)
• Long-term effects unknown
• May affect methylation (monitor if MTHFR issues)
• Interaction with NAD+-dependent medications unknown

Contraindications:

• Active cancer (theoretical concern - consult oncologist)
• Pregnancy/breastfeeding (no safety data)
• Children (not studied)

Quality concerns:

• NMN market has purity issues
• Third-party testing essential
• Degradation if improperly stored

Ideal for:

• Longevity-focused individuals over 40
• Those interested in cutting-edge anti-aging research
• People with resources for premium supplements
• Biohackers tracking biomarkers

May benefit:

• Anyone experiencing age-related energy decline
• Those with metabolic concerns
• Endurance athletes (mitochondrial support)

Should wait or skip:

• Under 30 (NAD+ levels still high)
• Budget-constrained (other interventions more proven)
• Those wanting guaranteed results (evidence still emerging)
• Anyone with active cancer (theoretical concern)

What to measure:

• Subjective energy levels (1-10 scale)
• Sleep quality
• Exercise performance/recovery
• Cognitive clarity

Blood biomarkers (optional but valuable):

• NAD+ levels (specialized labs like Jinfiniti)
• Biological age tests (TruAge, Index by Elysium)
• Fasting glucose and insulin
• Liver enzymes (safety monitoring)
• Inflammatory markers (hsCRP)

Timeline:

• NAD+ increase: Measurable within 2-4 weeks
• Subjective effects: 2-8 weeks
• Long-term assessment: 3-6 months

Signs it may be working:

• Improved energy levels
• Better exercise recovery
• Clearer cognition
• Improved NAD+ on blood tests
• Better biological age scores

NMN - Top recommendations:

• ProHealth Longevity NMN - Third-party tested, good reputation
• Renue By Science NMN - Sublingual and liposomal options
• DoNotAge NMN - Purity-focused, bulk options
• Alive By Science - Various delivery forms

NR (Nicotinamide Riboside):

• Tru Niagen - Most-studied NR brand, ChromaDex
• Life Extension NAD+ Cell Regenerator - Combines NR with other ingredients
• Thorne ResveraCel - NR + resveratrol combo

What to look for:

• Third-party purity testing (COA available)
• Proper storage/shipping (cool, dry)
• Reputable manufacturer
• >98% purity

What to avoid:

• Amazon sellers without verification (counterfeits common)
• Extremely cheap NMN (likely impure or degraded)
• Products without COA (Certificate of Analysis)

NMN pricing:

• Budget: $40-60/month (500mg/day, bulk powder)
• Mid-range: $60-100/month (500mg/day, capsules)
• Premium: $100-150/month (1,000mg/day, quality brand)

NR pricing:

• Tru Niagen: ~$50-70/month (300mg/day)
• Generic NR: ~$40-60/month

Cost comparison:

Cost-per-benefit assessment:

Expensive relative to evidence strength. Consider prioritizing proven interventions (exercise, sleep, basic supplements) before NMN/NR. Best value if buying bulk powder from reputable source.

Researchers:

• David Sinclair, PhD - Harvard, leading NAD+ researcher, author of "Lifespan"
• Charles Brenner, PhD - Discovered NR as NAD+ precursor, City of Hope
• Shin-ichiro Imai, MD, PhD - Washington University, NMN research pioneer

Practitioners:

• Rhonda Patrick, PhD - Discusses NAD+ science extensively

Skeptical voices:

• Some researchers question human translation of animal results
• Concerns about long-term safety data gaps
• Debate about NMN vs NR efficacy

Why it's trending:

• David Sinclair's book "Lifespan" and podcast appearances
• Visible biohacker community adoption
• Growing human clinical trials
• Anti-aging research funding boom

Common positive reports:

• "More energy, especially in afternoons"
• "Better workout recovery"
• "Clearer thinking"
• "Sleep quality improved"
• "Biological age test improved"

Common complaints:

• "Expensive for uncertain benefits"
• "Didn't notice anything dramatic"
• "Hard to know if it's actually working"
• "Quality concerns with some brands"

Pairs well with:

• Resveratrol - Activates sirtuins that use NAD+ (Sinclair stack)
• Creatine - Both support cellular energy
• Exercise - Also boosts NAD+ naturally
• Fasting/Time-restricted eating - Activates similar pathways

Longevity stack (advanced):

• NMN or NR (NAD+ precursor)
• Resveratrol (sirtuin activator)
• Quercetin + Fisetin (senolytic combo)
• Metformin or Berberine (AMPK activator)
• Note: This is experimental, not medical advice

Natural NAD+ boosters (cheaper alternatives):

• Exercise (especially HIIT)
• Fasting / caloric restriction
• Heat stress (sauna)
• Cold exposure
• Quality sleep

Timing:

• Morning dosing preferred (energy effects)
• Take resveratrol with fat for absorption
• Consistent daily use for best results