init · evidence-first review of NAD+
Evidence-based reviews of NAD+ therapy for energy, focus, and longevity.
The NAD Review reads the primary research so you don't have to — separating what holds up from the marketing that doesn't. No hype, every claim sourced, editorially independent.
evidence_index
What the data actually shows
- NAD+ Therapy for Energy, Focus & Longevity: The EvidenceAn honest, citation-backed look at what NAD+ therapy can and cannot do for energy, focus, and longevity — and where the evidence runs out.
- Does NAD+ Actually Boost Energy?NAD+ powers cellular energy metabolism — but does supplementing it make you feel more energetic? The honest answer from human trials.
- NMN vs NR: What the Human Trials ShowNMN and NR both raise NAD+ — but how do their human trials compare on insulin sensitivity, walking, sleep, cognition, and safety?
- Is NAD+ Really Anti-Aging?The NAD+ anti-aging story rests on sirtuins and animal data. Here's what human trials do — and don't — show about NAD+ and aging.
- NAD+ IV Therapy: Evidence, Benefits & What It CostsWhat the human evidence actually shows for NAD+ IV therapy, the benefits clinics promise vs. what's proven, and a realistic look at the cost.
- NAD+ Injections: What the Research Actually ShowsAn honest, citation-backed look at NAD+ injections (subcutaneous & IM): the human evidence, how they differ from oral NMN/NR, side effects, and typical cost.
- Liposomal NAD+: Does Oral Absorption Really Work?Liposomal NAD+ is sold as an oral shortcut past the gut. We check what absorption data exists — and the bioavailability claims are mostly brand-made.
- NAD+ Nasal Spray: Can It Absorb Through the Nose?NAD+ nasal sprays promise needle-free absorption. The honest answer: intranasal NAD+ is essentially unstudied in humans. Here's what the evidence shows.
- NAD+ Patches: Do Transdermal Patches Deliver Anything?NAD+ patches promise needle-free absorption through the skin. The honest answer: the skin barrier blocks large, charged molecules like NAD+. Here's the data.
- NMN vs NAD+: What's the Difference?NMN is a precursor; NAD+ is the working molecule it builds. Neither is a peptide. Here's the real difference — and why it matters for what you buy.
- Why People Stop Taking NMN (and the FDA NMN Saga)People quit NMN for three reasons: thin human benefits, cost, and the FDA mess. Here's the full regulatory arc — and what the science actually shows.
- NAD+ Side Effects: What to Expect by RouteNAD+ side effects depend heavily on how you take it. Here's what the human evidence shows for IV drips, injections, and oral precursors — route by route.
- NAD+ and Cancer: What the Evidence SaysDoes boosting NAD+ feed cancer? The biology is genuinely debated. Here's the honest evidence on NAD+ precursors, tumor metabolism, and who should be cautious.
- NAD+ Before & After: What Results Are Realistic?What changes after NAD+ injections, IV drips or precursors — and what doesn't? An honest, evidence-based look at realistic results and timelines.
- Best NAD+ Supplements, Rated by Evidence (2026)We evidence-tier the NAD+ supplements — NR, NMN, niacin, nicotinamide, liposomal NAD+ and IV. Precursors reliably raise the biomarker; outcomes stay unproven.
- Best NMN Supplements, Rated by Evidence & PurityHow to choose an NMN supplement honestly: what the human trials show, why third-party purity testing matters, and the FDA NMN saga that shaped the market.
- NAD+ Dosage Guide: How Much Per Day, by FormWhat the human trials actually used — NR, NMN, niacin, nicotinamide and IV NAD+ doses anchored to safety and biomarker endpoints, not promised outcomes.
- NAD+ for Women: Benefits, Menopause & What's ProvenNAD+ is marketed to women for energy, menopause, skin and fertility. Here's what the human evidence actually shows — and where it's still just biology.
- NAD+ for Skin: Does It Help Aging Skin?Topical niacinamide has real dermatology evidence for skin. Oral and IV 'NAD+ for skin' is a different, largely unproven claim. Here's the honest split.
- NAD+ and Resveratrol: Do You Need the "Sinclair Stack"?Should you take resveratrol with an NAD+ precursor? The popular pairing rests on a sirtuin theory — here's what human evidence actually shows.
- NAD+ IV Therapy for Addiction Recovery: What the Evidence ShowsDetox clinics market NAD+ IV drips for withdrawal and cravings. An honest look at the claimed mechanism, the very weak human evidence, and the cost.
- NAD+ for Long COVID and ME/CFS: What the Evidence ShowsNAD+ IV, NR, and NMN are marketed for long COVID and ME/CFS fatigue. An honest look at the mechanism, the small early trials, and what's actually proven.
- NMN and NAD+ for Fatty Liver (NAFLD/MASH): The EvidenceStrong animal data has fueled NMN and NR marketing for fatty liver. But what do the human trials show? An honest look at the evidence for NAFLD and MASH.
- NAD+ IV Therapy for Depression and Anxiety: The EvidenceClinics market NAD+ IV drips for depression, anxiety, and mood. An honest look at the mitochondrial rationale, the weak human evidence, and why to be cautious.
- Does NAD+ Cure a Hangover? What the Evidence ShowsNAD+ is consumed when your body metabolizes alcohol — but does an NAD+ drip or supplement actually cure a hangover? An honest look at theory vs. evidence.
- NMN for Athletes: Does It Improve Endurance and VO₂ Max?One real RCT in 48 runners found NMN improved aerobic capacity at 600–1200 mg/day. Here's what that single study shows — and what it can't tell you yet.
- Tru Niagen Review: Does NR Actually Work?Tru Niagen is the most-studied NR brand and reliably raises NAD+ ~40–50%. But do the downstream benefits follow? An honest, trial-by-trial review.
- Should You Take TMG With NMN?The TMG-with-NMN pairing rests on a methyl-drain theory. Here's what the human evidence actually supports — and why most people probably don't need it.
- Is NMN Legal? The FDA Ban and 2025 ReversalYes — NMN is a lawful US supplement again after the FDA's Sept 2025 reversal. Here's the full timeline, the EU and Australia status, and what it doesn't mean.
- How Long Does NAD+ IV Therapy Last?Clinics quote 7–14 days, but that number is practitioner convention, not trial-derived. Here's what's actually known about how long an NAD+ IV lasts.
- Best Time to Take NMN: Morning, Night, or With Food?Does NMN timing matter? The circadian rationale for morning dosing is reasonable but unproven — and the one timing trial actually favored the afternoon.
- Sublingual NMN vs Capsules: Is the Absorption Hype Real?Sublingual NMN is sold as '2–3x more bioavailable' than capsules — but no human trial proves it, and the studies showing NMN works used swallowed capsules.
- NAD+ (NR) for Parkinson's: What the NADPARK Trials ShowThe NADPARK and NR-SAFE trials show nicotinamide riboside reaches the brain and is safe in Parkinson's — but they're early Phase I trials, not proof it works.
- NMN for Fertility and Egg Quality: What the Evidence ShowsNMN and NAD+ are marketed for egg quality and fertility. The mouse data are striking — but the human evidence is essentially absent. An honest review.
- How to Boost NAD+ Naturally: Apigenin, CD38, Exercise & FastingExercise and niacin reliably raise NAD+ in humans. Apigenin blocks the CD38 enzyme that drains it — but mostly in cells. An honest, lifestyle-first guide.
- NMN for Sleep & Insomnia: What the Evidence ShowsCan NMN help you sleep? One 12-week trial found better sleep quality and less daytime drowsiness — but the timing nuance matters and insomnia data is thin.
- NAD+ for Heart Health & Heart Failure: The EvidenceCan NAD+ help the heart? A 2026 RCT in ischemic heart failure improved ejection fraction — but the data is small and early. An honest look at what's proven.
- NMN & NAD+ for Kidney Health (CKD): What's Proven?NMN and NAD+ protect kidneys in mice — but the human evidence for chronic kidney disease is thin, and NR, NMN and niacin don't behave the same way.
- NAD+ & NMN for Eye Health (Glaucoma, AMD): The EvidenceNiacin (vitamin B3) RCTs show real visual-field gains in glaucoma. But NMN for macular degeneration is still animal-only. An honest, source-checked review.
- NAD+ for Hearing Loss & Tinnitus: What the Evidence ShowsA 2026 double-blind RCT found IV NAD+ nearly doubled hearing recovery in sudden hearing loss. But age-related and noise data are still animal. An honest review.
- NMN for Menopause & Perimenopause: What the Evidence ShowsNMN is marketed for menopause symptoms, but no trial has measured hot flashes. Only a general sleep and energy trial exists. An honest look at the evidence gap.
- NAD+ and NADH for ME/CFS: What the Trials Actually ShowNADH is one of the few NAD+-related therapies tested in real ME/CFS trials. An honest look at the oral NADH studies, the CoQ10+NADH RCT, and the limits.
- NAD+ and NMN for Neuropathy: Impressive in Mice, Untested in PeopleNMN and NR reversed diabetic and chemo nerve damage in rodents via the NAD+ axon pathway — but there are no human neuropathy trials. The honest gap, explained.
- NMN Dosage by Body Weight (mg/kg): Why the Math Is WrongNMN per-kg calculators are extrapolated from mouse studies. Human trials used flat 250–1250 mg doses, not mg/kg — why weight-based NMN dosing misleads.
- Does NMN Actually Work? An Honest Look at the EvidenceNMN reliably raises blood NAD+ — but meta-analyses found no muscle, function, or metabolic benefit. The honest gap between the biomarker and the outcome.
- Can You Take NMN with Metformin? The Interaction, HonestlyNo known dangerous NMN–metformin interaction, and the mechanisms may even overlap — but the combined human evidence is thin. What's plausible vs proven.
- How Much Does NAD+ IV Therapy Cost? (2026 Price Guide)NAD+ IV therapy runs $250–$1,500 a session and $1,500–$6,000 a package, never covered by insurance — and the evidence rarely justifies it.
- Is NAD+ Therapy Worth It? An Evidence-Based Buyer GuideAn honest, evidence-based look at whether NAD+ therapy is worth the cost — who might benefit, who should skip it, and where the trials actually land.
- NAD+ IV vs Injection vs Oral: Which Delivery Works Best?IV, subcutaneous injection, or oral NAD+ — the bioavailability ranking is real, but higher blood NAD+ isn't proven to mean better outcomes.
- Tru Niagen vs Elysium Basis: Which NR Supplement Wins?Both raise NAD+ — but Tru Niagen is cheaper 300mg NR, while Basis adds pterostilbene at ~2× the price for no proven outcome benefit. An honest comparison.
- Elysium Basis Review: Is the Premium NR Worth the Price?Basis (NR + pterostilbene) has its own trial showing ~40% NAD+ rise and is NSF Certified for Sport — but at $480–720/yr with no proven outcome.
- How Long Does NMN Take to Work? A Realistic TimelineBlood NAD+ rises within weeks on NMN — but 'feeling it' is subjective and placebo-prone. The measured biomarker timeline vs. the felt-experience claims.
- NMN and Medications: Interactions You Should KnowNo well-documented dangerous NMN drug interactions at typical 250–500 mg doses — but the data is thin. The honest cautions for liver, metformin, and cancer.
- Renue By Science Liposomal NMN Review (2026)Renue By Science is among the better-evidenced liposomal NMN brands — but its NAD+ study is a tiny company trial, and the absorption claim is unvalidated.
- Wonderfeel Youngr NMN Review: Is 900mg Worth It?Wonderfeel Youngr pairs a high 900mg NMN dose with resveratrol, ergothioneine and hydroxytyrosol. The dose is real — but the blend makes any benefit unprovable.
- Trigonelline: The Next-Gen NAD+ Precursor, ReviewedTrigonelline is a coffee-derived alkaloid newly identified as an NAD+ precursor. What the 2024 muscle-ageing research actually shows — and what it doesn't.
- NAD+ Injections Near Me: How to Find a Legit ProviderSearching 'NAD+ injections near me'? How to vet a legit clinic or telehealth provider, what to expect, real 2026 cost ranges, and at-home vs in-clinic.
- Qualia NAD+ Review: Is the Multi-Ingredient Formula Worth It?Qualia NAD+ stacks NR, niacinamide, and herbal extracts into one formula. An honest review of what's proven, what isn't, and whether it earns its price.
- Thorne Niacel 400 Review: A Trusted NR Brand, ExaminedThorne Niacel 400 delivers 400 mg of nicotinamide riboside per capsule. An honest review of the evidence, the trusted-brand premium, and whether it's worth it.
- NMN Side Effects: What the Human Studies Actually ShowNMN was well tolerated in short human trials — mostly mild GI effects, no serious signal — but long-term safety is genuinely unestablished. The honest picture.
- Does NMN Cause Cancer? Separating the Lab Theory From the Human EvidenceDoes NMN cause cancer? There's no human evidence it does — but the lab biology is genuinely unsettled. Here's the honest split between theory and proof.
- Nicotinamide Riboside (NR) Side Effects: What the Trials ShowNicotinamide riboside (NR) was well tolerated in human RCTs — mostly mild GI effects, no serious signal — but long-term NR safety isn't fully established.
- Nicotinamide Riboside (NR) Benefits: What's Actually Proven in HumansNicotinamide riboside (NR) reliably raises blood NAD+ in humans — but the anti-aging and energy benefits people buy it for are largely unproven.
- Nicotinamide Riboside (NR) Dosage: What the Trials UsedNicotinamide riboside (NR) has real human RCT dosing — trials used ~250–1000 mg/day. What the studies actually used, and why more isn't proven better.
- Is Nicotinamide Riboside (NR) Worth It? An Honest VerdictIs nicotinamide riboside worth it? NR reliably raises NAD+ and is well tolerated — but the anti-aging payoff is unproven, and branded NR isn't cheap.
- Tru Niagen vs NMN: Which NAD+ Booster Should You Pick?Tru Niagen (branded NR) vs NMN: how they compare on human evidence, FDA regulatory status, cost, and what each actually proves.
- Nicotinamide Riboside vs Niacin: Both Raise NAD+, But DifferentlyNR and niacin are both vitamin B3 forms that raise NAD+. Niacin is cheap with a long outcome record but flushes; NR is flush-free and pricey.
- NAD+ and Your Body Clock: Circadian Rhythm and Jet LagYour NAD+ rises and falls on a daily clock. The real biology linking NAD+ to circadian rhythm — and why the jet-lag pitch is unproven in humans.
- NAD+ for Weight Loss: What the Human Evidence Actually ShowsNMN reversed diet-induced obesity in mice — but in humans, the key NAD+ trial left body weight unchanged. An honest look at NAD+ for weight loss.
- Can Food Raise NAD+? NAD+ Foods and Precursors, HonestlyYour body makes NAD+ from dietary B3 and tryptophan. But the NMN and NR in “NAD+ foods” are trace amounts — far below the doses trials used.
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method
Evidence-based
Every conclusion traces back to primary research or official labeling.
sourcing
Every claim sourced
Inline citations to the studies — including the null results and caveats.
independence
Editorially independent
Conclusions reflect evidence and judgment, never the size of a commission.
Read how we research and rank in our editorial policy, and how we stay independent on our about page.