Equipment Reference
ChromaDex / Tru Niagen
Tru Niagen (NR)
NAD+ precursor for cellular energy and longevity
Tru Niagen is the branded form of nicotinamide riboside (NR), a vitamin B3 derivative that raises NAD+ levels in cells. NAD+ declines ~50% between ages 40–60 and is essential for mitochondrial energy production, DNA repair (via sirtuins), and hundreds of metabolic reactions. Dave Asprey, Bryan Johnson, and longevity researchers take NAD+ precursors daily as a foundational anti-aging supplement.
Typical price: $47 – $120 USD / month
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How It Works
NAD+ is one of the most critical molecules in human biology, required for energy production, DNA repair, and activating sirtuins that regulate aging pathways. NAD+ levels decline with age, correlating with reduced mitochondrial function and increased disease risk. NR supplementation raises NAD+ levels 40–50% in human studies, potentially restoring youthful cellular function. The longevity hypothesis: maintaining NAD+ levels slows age-related decline.
NAD+ Precursor
NR is converted to NAD+ (nicotinamide adenine dinucleotide) in cells via the salvage pathway, more efficiently than niacin or nicotinamide.
Sirtuin Activation
Higher NAD+ activates sirtuins (SIRT1, SIRT3), 'longevity genes' involved in DNA repair, inflammation control, and mitochondrial biogenesis.
Mitochondrial Support
NAD+ is required for oxidative phosphorylation, the process mitochondria use to produce ATP. More NAD+ = more cellular energy.
Daily Supplementation
Typical dose: 300–1000mg NR daily. Effects are cumulative, NAD+ levels build over weeks of consistent use.
What You'll Experience
First Week
Days 1–7Subtle or no noticeable effects for most. Some report slightly improved energy or mental clarity. NAD+ is building at the cellular level.
First Month
Weeks 2–4Energy improvements become more consistent for responders. Better exercise recovery reported. Sleep quality may improve slightly.
Three Months
Month 2–3Long-term users report sustained energy, improved skin, and better stress tolerance. Non-responders may feel nothing, genetics play a role.
Long-term Stack
6+ monthsPart of a daily longevity stack alongside resveratrol, TMG (methyl donor), and spermidine. Regular blood NAD+ testing tracks efficacy.
Benefits
NAD+ Level Restoration
Moderate EvidenceHuman trials show 40–50% NAD+ increase with 300–1000mg NR daily over 8 weeks.
Energy & Mitochondrial Function
Moderate EvidenceUsers commonly report improved energy and reduced fatigue, especially those over 40.
Cellular Repair Support
Emerging ResearchNAD+ activates sirtuins and PARP enzymes involved in DNA repair and genomic stability.
Cardiovascular Markers
Emerging ResearchSome studies show improved arterial stiffness and blood pressure in middle-aged adults.
Risks & Considerations
Non-Responders
low riskNot everyone feels subjective effects. NAD+ may still be rising at the cellular level without noticeable changes.
Methyl Depletion
medium riskNR metabolism consumes methyl groups. Pair with TMG (trimethylglycine) 500–1000mg to prevent depletion.
Cost Over Time
low risk$47–120/month indefinitely. NMN alternatives may be cheaper but with less clinical data.
Long-term Data Limited
medium riskNAD+ precursors are relatively new. Decades-long safety and efficacy data doesn't exist yet.
Community Reviews
Synthesized consensus from Reddit, forums, and expert sources.
NAD+ precursors are divisive. Believers swear by energy improvements; skeptics call it expensive pee. NR vs NMN debate is ongoing.
- ·NR has more human clinical data than NMN
- ·Always pair with TMG to prevent methyl depletion
- ·Test NAD+ levels before and after (Jinfiniti test)
- ·Subtle effects, don't expect a stimulant feeling
Sinclair's research drives interest. Tru Niagen is the most clinically studied NR brand. NMN is the popular alternative with less data.
- ·Sinclair takes NMN, not NR, confusing for consumers
- ·Renue by Science and DoNotAge popular for NMN
- ·Effects are subtle and long-term
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