NAD+ & Cellular Energy
About this protocol
Where to start
Set expectations. NAD+ precursors reliably raise blood NAD+ levels. Whether that translates to felt benefits varies dramatically by individual. Some users report meaningful energy and recovery improvements; others notice nothing. Plan a structured 3-6 month trial with measurable endpoints (energy, sleep quality, exercise recovery, lab work).
Start with NMN or NR. Both raise NAD+ similarly. NR has slightly more human trial backing; NMN has more popular interest. Functional difference is small.
Add TMG (trimethylglycine) as a methyl donor. NAD+ precursors consume methyl groups during metabolism; supplementing methyl donors prevents methylation depletion.
Resveratrol is the controversial complement. The Sinclair-popularized "NMN + resveratrol" stack rests on weak human evidence (mostly mouse models). Include it if you want completeness; skip if you want simplicity.
Niacin (low-dose, flush-free) is the traditional NAD+ precursor and dramatically cheaper than NMN/NR. Works through a different pathway but raises NAD+ similarly in some studies.
Get baseline labs: comprehensive metabolic panel, lipid panel, hsCRP, fasting glucose, HbA1c. Re-check at 3-6 months. NAD+ levels themselves are testable but expensive and inconsistent across labs.
4 nutrients
Start here
Strongest evidence — the foundation of the stack.
NMN or NR (NAD+ Precursor)
NMN: 250-500 mg daily, with breakfast. OR NR: 300-500 mg daily.Nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR) are NAD+ precursors that reliably raise blood NAD+ levels in human trials. NR has slightly more peer-reviewed human safety data (Niagen branded form); NMN has more popular interest. Functional difference is small. Both raise NAD+ by 30-100% in trials. Human longevity/healthspan endpoints remain preliminary.[1, 2, 3, 4]
TMG (Trimethylglycine / Betaine Anhydrous)
500-1000 mg daily, with breakfastTMG is a methyl donor that supports methylation cycles depleted by NAD+ metabolism. The proposed mechanism: NMN/NR raise NAD+ but consume methyl groups during nicotinamide metabolism. TMG supplementation prevents methylation depletion and supports homocysteine metabolism. Often recommended as a pairing supplement with NMN/NR.[5, 6, 7]
Experimental
Emerging evidence — try last, only if curious.
Resveratrol (with NMN/NR)
250-500 mg trans-resveratrol daily, with a fat-containing mealResveratrol is a polyphenol popularized by David Sinclair''s NMN+resveratrol stack. The pairing rests on weak human evidence — most positive findings are from mouse models. Resveratrol activates SIRT1 (a sirtuin enzyme that uses NAD+), theoretically amplifying NMN/NR effects. Human longevity/healthspan endpoints remain preliminary. Trans-resveratrol is the form with bioactivity; choose a product that specifies trans-resveratrol content.[8, 9, 10]
Niacin (Low-Dose Flush-Free)
100-500 mg daily as nicotinic acid or inositol hexanicotinateNiacin is the traditional NAD+ precursor — dramatically cheaper than NMN or NR. Works through a different pathway but raises NAD+ similarly in some studies. The catch: nicotinic acid causes uncomfortable flushing at meaningful doses (often used therapeutically for lipid management). Inositol hexanicotinate is flush-free but lower in evidence for raising NAD+ specifically. Treat as exploratory in the longevity context.[11, 12]
Warnings
Lifestyle improvements
Foundational Longevity is the better starting protocol
For general healthspan, Foundational Longevity (omega-3, vitamin D3, creatine, glycine) has stronger long-term human evidence. This NAD+ protocol is exploratory — best added on top of, not in place of, the foundational stack.
Exercise generates endogenous NAD+
Aerobic exercise and high-intensity training acutely raise NAD+ and chronically upregulate the salvage pathway. The most-evidenced lifestyle intervention for cellular energy.
Sleep 7-9 hours
NAD+ has circadian variation. Disrupted sleep disrupts NAD+ cycling. Chronic short sleep is one of the most under-recognized drivers of cellular aging.
Caloric restriction or time-restricted eating
Mild caloric restriction or 12-16 hour time-restricted eating windows upregulate NAD+ salvage and SIRT1 activity. Lifestyle approach with stronger long-term evidence than supplementation.
Avoid excessive niacin amide
Counter-intuitively, nicotinamide (the amide form) can INHIBIT sirtuins at high doses — exactly opposite to what NMN/NR aim for. Don''t supplement high-dose plain nicotinamide.
Track measurable endpoints
NAD+ levels themselves are testable but expensive. Better: track perceived energy, exercise recovery, sleep quality, and lab work (lipid panel, hsCRP, HbA1c). Set up a structured 3-6 month trial.
Don''t chase the latest molecule
NAD+ precursors have inspired a cottage industry of related compounds (NMNH, NR-CL, MIB-626, etc.) most of which lack any human data. Stick to NMN or NR until something with better evidence appears.
Watch for sleep effects
Some users report better sleep on NMN/NR; others report disrupted sleep. Try morning dosing first; if sleep is affected, take earlier in the day.
Don''t expect the moon
Animal models show striking healthspan effects. Human data is much more modest. Reasonable expectations: subtle improvements in energy, recovery, and (over years) cardiometabolic markers. Not dramatic next-week transformation.
Brand quality matters
The NMN/NR market has quality control issues. Choose third-party-tested brands (NSF, USP) and look for Certificate of Analysis (CoA). Branded forms (Niagen for NR, Sinclair Labs or branded NMN with stability testing) are worth the premium.
References
- NMN — supplement research overviewExamine.com link
- Yoshino M, et al. Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women. Science. 2021;372(6547):1224-1229.PubMed link
- Trammell SA, et al. Nicotinamide riboside is uniquely and orally bioavailable in mice and humans. Nat Commun. 2016;7:12948.PubMed link
- Martens CR, et al. Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nat Commun. 2018;9(1):1286.PubMed link
- Betaine (TMG) — supplement research overviewExamine.com link
- Olthof MR, et al. Low dose betaine supplementation leads to immediate and long term lowering of plasma homocysteine in healthy men and women. J Nutr. 2003;133(12):4135-4138.PubMed link
- McRae MP. Betaine supplementation decreases plasma homocysteine in healthy adult participants: a meta-analysis. J Chiropr Med. 2013;12(1):20-25.PubMed link
- Resveratrol — supplement research overviewExamine.com link
- Novelle MG, et al. Resveratrol supplementation: Where are we now and where should we go? Ageing Res Rev. 2015;21:1-15.PubMed link
- Berman AY, et al. The therapeutic potential of resveratrol: a review of clinical trials. NPJ Precis Oncol. 2017;1:35.PubMed link
- Niacin — supplement research overviewExamine.com link
- Nadeeshani H, et al. Nicotinamide mononucleotide (NMN) as an anti-aging health product. J Adv Res. 2022;37:267-278.PubMed link
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Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This protocol is educational, not a substitute for personalized medical advice. Talk to your doctor before starting any new supplement regimen — especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition. Last updated 5/20/2026.