--- title: "Modafinil vs NAD+: Side-by-Side Comparison (2026)" url: https://www.bodyhackguide.co/compare/modafinil-vs-nad description: "Compare Modafinil vs NAD+ side by side. We earn a commission on some vendor links. Mechanism, half-life, dose range, side effects and prices. NAD+ from $25.00." lang: en --- Skip to content Compare notes on r/BodyHackGuide (https://reddit.com/r/bodyhackguide) Compare notes with other researchers. Join r/BodyHackGuide (https://reddit.com/r/bodyhackguide) # Modafinil vs NAD+ Side-by-side comparison of Modafinil and NAD+: mechanism, half-life, dose range, safety profile, and vendor pricing. Modafinil: no price on file NAD+ from $25.00 ## Price snapshot ### Modafinil Current low — 7-day low — not enough history yet 30-day low — not enough history yet 30-day change — not enough history yet ### NAD+ Current low $25.00 current listings 7-day low — not enough history yet 30-day low — not enough history yet 30-day change — not enough history yet ## Modafinil Modafinil is a prescription wakefulness-promoting agent approved by the US Food and Drug Administration in December 1998 under the brand name Provigil (Cephalon, now Teva) for the treatment of excessive daytime… No vendor price on file. Full Modafinil profile (https://www.bodyhackguide.co/compound/modafinil) ## NAD+ NAD+ (nicotinamide adenine dinucleotide, oxidized form) is a pyridine dinucleotide coenzyme essential to energy metabolism, DNA repair via PARP enzymes, sirtuin-mediated gene regulation, and calcium signaling via CD38.… **Lowest listed price:** $25.00 across 11 listings Full NAD+ profile (https://www.bodyhackguide.co/compound/nad) ## Side-by-side comparison | Attribute | Modafinil | NAD+ | | --- | --- | --- | | Category | Nootropics | Longevity | | Research Stage | Preclinical | Phase II | | Mechanism of Action | Modafinil's mechanism of action is genuinely incompletely understood despite more than two decades of clinical use and extensive preclinical research. It is not a classical stimulant — it does not produce the catecholamine surge of amphetamines, the direct… | Redox Cofactor Function NAD+ serves as the primary electron acceptor in catabolic reactions (glycolysis, TCA cycle, fatty acid oxidation), cycling between its oxidized (NAD+) and reduced (NADH) forms. This fundamental energy metabolism role means every cell… | | Half-Life | — | Varies by form: NR ~8 hours plasma; NMN ~1-2 hours plasma; IV NAD+ infusion dose-dependent | | Typical Dose Range | — | Oral precursors: NR 300-2,000 mg/day, NMN 250-900 mg/day, NAM 500-1,500 mg/day; IV NAD+ 500-1,500 mg per session. | | Dosing Frequency | — | Oral precursors once daily (higher doses split AM/midday); IV NAD+ weekly-to-monthly at clinics. | | Administration | — | Oral (precursors), Intravenous, Intramuscular, Subcutaneous | | Side Effects | Modafinil's side effect profile is relatively favorable compared to classical stimulants but is not negligible. The most common side effects, reported in 5-10% or more of users in clinical trials, are headache (dose-related, typically transient but… | Nicotinamide Riboside (NR) NR has the best-characterized safety profile of the NAD+ precursors. Across published RCTs at 1,000-2,000 mg/day for up to 12 weeks, adverse effects have been mild and uncommon: - Gastrointestinal upset (5-10% of users) - Mild… | | Molecular Weight | — | 663.4 g/mol (NAD+); NR 255.3 g/mol; NMN 334.2 g/mol; NAM 122.1 g/mol | | Common Vial Sizes | — | 100mg, 250mg, 500mg | ## Price History 4 data points - OF - BM - Half Nattys - Ion Peptide - BHG Labs ### Modafinil: potential benefits - No structured benefit list published. ### NAD+: potential benefits - Restores age-associated NAD+ decline — 50% loss between young and older adulthood - Increases peripheral blood NAD+ by up to 142% at 1,000 mg NR daily (Elhassan 2019) - Supports sirtuin-mediated gene regulation and PARP-mediated DNA repair - Improves muscle insulin sensitivity in prediabetic postmenopausal women (Yoshino 2021) - Increases aerobic performance in amateur runners at 300-600 mg NMN (Liao 2021) - Reduces inflammatory cytokines (IL-6, TNF-alpha) in middle-aged/elderly (Martens, Elhassan) - Brain NAD+ elevation demonstrated in Parkinson trial (Brakedal 2022) - Excellent safety profile at evidence-supported doses (500-2000 mg/day NR) ## Frequently asked ### What's the difference between Modafinil and NAD+? Modafinil is a nootropics that modafinil's mechanism of action is genuinely incompletely understood despite more than two decades of clinical use and extensive preclinical research. it is not a classical…. NAD+ is a longevity that redox cofactor function nad+ serves as the primary electron acceptor in catabolic reactions (glycolysis, tca cycle, fatty acid oxidation), cycling between its oxidized (nad+) and…. The two differ in mechanism, half-life (not reported vs Varies by form: NR ~8 hours plasma; NMN ~1-2 hours plasma; IV NAD+ infusion dose-dependent), and typical dose range. ### Which has the longer half-life, Modafinil or NAD+? Modafinil has a half-life of not reported. NAD+ has a half-life of Varies by form: NR ~8 hours plasma; NMN ~1-2 hours plasma; IV NAD+ infusion dose-dependent. Longer half-lives generally mean less frequent dosing but slower on/off kinetics. ### Can you stack Modafinil and NAD+? Stacking depends on mechanism overlap, safety profile, and goals. Modafinil and NAD+ should only be stacked after reviewing each compound's individual protocol page, side effect profile, and any published interaction data. Use the BodyHackGuide stack builder for a structured review before combining research compounds. ## See current vendor prices Listings from the vendors we track. Prices change often, so check the vendor before you buy. Modafinil prices: https://www.bodyhackguide.co/compound/modafinil?tab=prices NAD+ prices: https://www.bodyhackguide.co/compound/nad?tab=prices Compare all compounds: https://www.bodyhackguide.co/compare ### Before you buy Modafinil or NAD+ Check the vendor trust score. Every supplier we track is rated 0-100 on COA verification, payment transparency, shipping, reviews, and listings: one published, reproducible methodology, applied to every vendor. View Vendor Scorecard (https://www.bodyhackguide.co/vendors/scorecard) ## Related comparisons Modafinil vs Phenylpiracetam: https://www.bodyhackguide.co/compare/modafinil-vs-phenylpiracetam Bromantane vs Modafinil: https://www.bodyhackguide.co/compare/bromantane-vs-modafinil NMN vs NAD: https://www.bodyhackguide.co/compare/nmn-vs-nad **Research use only.** BodyHackGuide is a research and price-comparison reference. The compounds discussed on this page are not approved by the FDA for human consumption and are sold strictly for laboratory research. Prices shown are pulled from vendor listings tracked on BHG and are subject to change. Every vendor is ranked on the same public, reproducible methodology. See editorial standards (https://www.bodyhackguide.co/editorial-standards) and affiliate disclosure (https://www.bodyhackguide.co/affiliate-disclosure). 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