Reviews and Information for NMN (Nicotinamide Mononucleotide)
NAD Boosters (NAD+/NADH, Nicotinamide Riboside, and NMN)
Several supplements can boost levels of NAD in the body, but does it matter and how do these products compare? Find out in this review in which ConsumerLab purchased and tested the quality of popular NAD+, NADH, nicotinamide riboside, and NMN supplements and evaluated the research behind them.
NAD Boosters (NAD+/NADH, Nicotinamide Riboside, and NMN) Review
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Clinical Update
3/26/2024
NMN Off Walmart, iHerb
Walmart and iHerb have joined Amazon in no longer selling NMN (nicotinamide mononucleotide) supplements. To find out why, see the NAD Boosters Review, which includes our tests of NMN, NADH, and nicotinamide riboside products and our Top Picks among them.
Clinical Update
1/02/2025
Is NMN Still Sold?
NMN (nicotinamide mononucleotide) supplements are no longer sold by Amazon and Walmart. Find out why and where NMN is still sold in our NAD Booster Supplements Review, which includes our Top Picks among products.
Clinical Update
2/15/2022
NMN for Better Sleep?
Can nicotinamide mononucleotide (NMN) improve sleep and reduce daytime drowsiness? See what a new study found in the What It Does section of our NAD Booster Supplements Review. Also see our Top Picks among products, including NMN, NAD+/NADH, and nicotinamide riboside.
See our answer to the question: Which supplements can help me sleep and which cause insomnia?
Clinical Update
9/19/2025
NMN for Anti-Aging?
Does nicotinamide mononucleotide (NMN) improve muscle or brain function in older men? See what research suggests – and our take on it -- in our NAD Booster Supplements Review, which includes our Top Picks for NMN, as well as NAD/NADH and nicotinamide riboside.
Clinical Update
12/10/2021
64% of NMN Supplements Fail Tests
Fourteen of the 22 most popular NMN supplements (which can boost NAD+ levels) on Amazon were recently discovered to contain no detectable NMN. See the results in the Update to our NAD Boosters Review, which includes CL's tests of additional NMN, NADH, and nicotinamide riboside supplements, as well as our Top Picks.
Product Update
9/29/2025
NMN Allowed in Supplements
The FDA has changed course on NMN which, earlier, it had said should not be sold as a dietary supplement. Get the details in our NAD Booster Supplements Review, which includes our Top Picks for NAD+/NADH, nicotinamide riboside, and NMN.
Clinical Update
5/21/2025
Nicotinamide Riboside for Cognition?
Does taking nicotinamide riboside (an "NAD Booster" also known as NR) improve cognitive function in people with peripheral artery disease? See what a recent study found in the Nicotinamide riboside section of our NAD Booster Supplements Review, which includes our Top Picks for NAD+/NADH, nicotinamide riboside, and NMN.
Clinical Update
11/17/2025
A Supplement for Long COVID?
Did nicotinamide riboside (an NAD booster) improve symptoms like “brain fog” in people with long COVID? See the study results in our NAD Boosters Review, which includes our Top Picks for NAD, NADH, nicotinamide riboside, and NMN.
Product Update
3/19/2026
Niagen Overhyped
The maker of Niagen (a supplement containing nicotinamide riboside) was recently challenged regarding several of its marketing claims. Find out why, and how the company responded, in our NAD Boosters Review, which includes our Top Picks for NAD/NADH, nicotinamide riboside, and NMN.
Product Update
4/20/2026
NR: Many Don’t Match the Label
Testing found only 26 of 70 NR (nicotinamide riboside) supplements near their label claim – and many had little to none. For details, see our NAD Booster Supplements Review, which includes our Top Picks for NAD/NADH, nicotinamide riboside, and NMN.
Clinical Update
8/12/2025
Many NAD Fail Tests
Recent tests of popular NAD+ supplements revealed that half of the products contained hardly any NAD+. For details by brand, see the Quality Concerns section of our NAD Booster Supplements Review. Also see our Top Picks among NAD boosters (including NMN and nicotinamide riboside).
Product Update
10/20/2025
Misleading Liposome Labels
Some "liposomal" supplements may not deliver what their labels proclaim. See an example in our NAD Booster Supplements Review, which includes our Top Picks for NAD+/NADH, nicotinamide riboside, and NMN. Also learn 8 Red Flags with Supplements.
CL Answer
Are David Beckham’s IM8 Supplements Worth Taking?
IM8 markets two main products that claim to help you "feel amazing today," and "stay young tomorrow." Find out if these products work and if we think they're worth the cost.
CL Answer
Is it okay to take vitamin D3 and fish oil together?
Find out if taking vitamin D and fish oil is okay, how it effects absorption, and the best way to take vitamin D to improve absorption. ConsumerLab.com's answer explains.
Product Update
5/26/2026
How Much NMN is Safe?
Most supplements that provide NMN – an NAD booster -- deliver amounts of niacin that would normally exceed tolerable limits. Does that make NMN unsafe? Learn what an expert panel concluded in our NAD Boosters Review + see our Top Picks among tested products.
News Release
November 05, 2021
NAD Boosters for Energy and Memory? ConsumerLab Reviews NAD+, NAHD and NMN Supplements
White Plains, New York, November 5, 2021 — Most cells in the body use NAD (nicotinamide adenine dinucleotide) in the process of energy production, and compounds that boost blood levels of NAD are often sold in supplements marketed for a wide range of benefits, from increasing energy and ...
Clinical Update
4/19/2024
NMN and Kidney Injury
New laboratory research suggests that long-term supplementation with NMN might cause kidney injury in older people. Learn more in the Concerns and Cautions section of our NAD Booster Supplements Review.
Clinical Update
11/15/2022
NMN Can No Longer Be Sold as a Supplement
The FDA recently took the position that NMN, an NAD booster, cannot be sold as a dietary supplement. For details, see the NAD Boosters Review.
Clinical Update
1/20/2025
Nicotinamide Riboside for Cognition?
Did nicotinamide riboside improve memory, attention or cognition among older people with cognitive decline in a recent study? Find out in the Nicotinamide riboside section of our NAD Booster Supplements Review, which includes our Top Picks for nicotinamide riboside.
Clinical Update
5/13/2022
New Nicotinamide Riboside Top Pick
We recently tested and Approved a nicotinamide riboside supplement that provides the most-studied form of nicotinamide riboside and is our new Top Pick for nicotinamide riboside in our NAD Booster Review.
Clinical Update
1/13/2021
Nicotinamide Riboside to Slow Aging and Reverse NAD+ Decline?
Nicotinamide riboside, a form of niacin, has been promoted to slow aging, partially based on the belief that it raises NAD+ levels that fall with age. A new study raises doubts about this. Get the details in the Niacin section of our B Vitamin Supplement Review. Also, learn about a concern with taking too much nicotinamide riboside.
Clinical Update
2/28/2023
Nicotinamide Riboside for Alzheimer's?
A preliminary clinical study suggested that taking nicotinamide riboside reduced blood markers of Alzheimer’s disease. For details, see the What It Does section of our NAD Boosters Review, which includes our Top Pick among nicotinamide riboside supplements.
Also see: Do any supplements, foods or lifestyle modifications help with brain function, like memory and cognition?
Clinical Update
12/12/2023
Nicotinamide Riboside Side Effects
What are the common side effects of nicotinamide riboside (found in Tru Niagen), and is it safe? Find out what a recent study showed in the Concerns and Cautions section of our NAD Booster Supplements Review. Also see our Top Picks for nicotinamide riboside and other NAD boosters.
Clinical Update
2/13/2024
Supplement for Cognition?
Does taking nicotinamide riboside improve cognitive or physical function among older people with mild cognitive impairment? See what a recent study showed in the Nicotinamide riboside section of our NAD Booster Supplements Review. Also see our Top Pick for nicotinamide riboside.
Also see our article about supplements for memory and cognition.
Clinical Update
6/18/2024
Nicotinamide Riboside for Peripheral Artery Disease?
Does taking nicotinamide riboside improve physical capabilities in people with peripheral artery disease? Find out what a recent study found in the Nicotinamide riboside section of our NAD Booster Supplements Review, which includes our Top Picks among products.
Clinical Update
9/19/2025
Niacin May Reduce Skin Cancer?
Taking high-dose nicotinamide (a common form of niacin) may reduce the risk of certain types of skin cancer, according to a new study. Get the details in the Niacin section of our B Vitamin Supplements Review, which includes our Top Picks for niacin/nicotinamide and other B vitamins.
Clinical Update
2/03/2023
Niacin & Cancer?
The NAD booster, nicotinamide riboside, might promote growth of existing cancers. Is there similar risk with niacin and niacinamide (nicotinamide)? Find out what evidence suggests in the Concerns and Cautions section of our NAD Booster Supplements Review.
Also, see our Top Pick among niacin supplements in our B Vitamin Supplements Review.
Clinical Update
1/20/2025
Nicotinamide for Glaucoma?
Some preliminary research suggests nicotinamide (a form of niacin) may help with glaucoma, but is this recommended? Find out in our B Vitamins Supplements Review, which includes our Top Picks among B vitamin supplements.
Clinical Update
10/09/2021
Niagen for Energy?
The maker of Niagen (a supplement containing nicotinamide riboside) was challenged regarding its claim that Niagen boosts energy and performance. See how the company responded in the Nicotinamide Riboside section of our B Vitamins Supplements Review.
Clinical Update
4/03/2018
What Niagen Does
Niagen (nicotinamide riboside) has been promoted as an anti-aging supplement. Find out what's been shown in clinical studies, including one published recently, in the Niacin section of the B Vitamin Supplements Review.
Clinical Update
Clinical Update
6/19/2019
NAD+ and Cancer?
Supplements that raise NAD+ levels in the body have been promoted for anti-aging effects. But there is a theoretical risk that they could stimulate cancerous cells, and a CL member reported this week that a supplement containing such an ingredient, nicotinamide riboside, appeared to increase his PSA level. Learn more in the Niacin section of the B Vitamin Supplements Review.
Clinical Update
7/20/2019
Is Niagen Safe?
Niagen (nicotinamide riboside) was recently studied for its safety and ability to raise NAD+ in the body. See the results and learn more about this form of niacin (which is also in the product Basis) in the Niacin section of the B Vitamin Supplements Review. Also see our Top Picks for niacin and other B vitamin supplements.
Clinical Update
11/15/2022
NAD Booster & Cancer Risk
The NAD booster, nicotinamide riboside, increased the spread of certain aggressive cancers in a recent laboratory study, adding to existing concerns. Get the details in the Concerns and Cautions section of our NAD Booster Supplements Review.
Also, see our CL Answer about vitamins and cancer risk.
Clinical Update
3/03/2025
Counterfeit Supplements
Twenty-nine out of 39 supplements containing the "NAD booster" nicotinamide riboside were recently found to contain much less ingredient than claimed, with many containing under 1%. Counterfeit versions of Tru Niagen were also identified. Details are in our NAD Booster Supplements Review, which includes our Top Picks among products.
Also see our article about avoiding counterfeit supplements online.
Clinical Update
5/22/2025
Niacin for Skin Cancer
Some research suggests that taking high-dose niacin (as nicotinamide, also called niacinamide) can reduce skin cancer risk. Learn more about this (and an observational study of its safety) in the Niacin section of our B Vitamins Review, which includes our Top Picks for niacinamide supplements and other B vitamins.
Product Update
5/28/2026
Is This NAD Booster Overhyped?
The maker of Tru Niagen (which contains the NAD booster nicotinamide riboside) challenged recommendations that it stop making certain health-benefit claims. Find out how a review board responded in our NAD Boosters Review + see our Top Picks among NAD Boosters.
Recalls & Warnings
December 01, 2020
Niagen Cannot Be Promoted to Prevent or Treat COVID-19, Warns FDA
On November 17, 2020, the FDA issued warning letters to the sellers of Niagen and Nadovim, supplements that contain different forms of niacin, for selling products with unsupported claims that they can treat coronavirus (COVID-19).
Recalls & Warnings
May 09, 2020
FDA Warns Sellers of Essential Oils, CBD, Vitamins, and More Promoted to Treat Coronavirus
Between May 7 and May 8, 2020, the FDA issued warning letters to seven companies for selling products such as essential oils, CBD, hand sanitizers, and vitamins with unsupported claims that they can treat coronavirus (COVID-19).
