Are NAD+ supplements (NMN/NR) worth it?
NMN and NR demonstrably raise NAD+ in your blood and appear to be safe, but whether you will notice any benefit in muscle strength, heart function or memory has not yet been proven in humans. Note also: NR is authorised in the EU as a supplement; NMN is not (yet).
NAD+ is present in every cell and is essential for energy production, DNA repair and the suppression of inflammation. Your levels decline as you age, although that has only been consistently demonstrated in a handful of human studies. What exactly that decline causes is known mainly from cell and animal research, and those findings do not translate straightforwardly to humans1,2.
On one point the human evidence is reasonably solid: when you swallow a capsule or tablet of NMN (nicotinamide mononucleotide) or NR (nicotinamide riboside), your NAD+ levels rise measurably in blood and in multiple tissues. Both have been found safe and well tolerated at the tested doses, with no serious side effects2,3,1. Which of the two you take does not matter: both raise NAD+ to a comparable degree. Doses above 600 mg of NMN produce no additional increase.
Whether higher NAD+ levels also deliver noticeable health benefits is the big open question. For muscle strength, heart function and cognition, outcomes in humans are mixed and inconclusive. The studies are too small for firm conclusions2,1,3. For general anti-ageing or lifespan extension there is no human evidence: this area has been too little studied to recommend. If you want to try it for endurance, take 600 mg of NMN per day in capsule form for at least 60 days. Pay attention to the label: look for 'NMN (nicotinamide mononucleotide)' with the amount in mg per capsule. The brand does not matter.
In mouse studies the picture looks more promising: in mice with Alzheimer-like features, NR reduced brain inflammation and improved memory4. Positive effects have also been found in animals for heart and metabolic diseases, but robust human evidence is still lacking5. Note the legal status as well: NR is authorised in the EU as a supplement, but NMN is not yet on that list and may not currently be sold as a supplement here (EFSA did rule in 2026 that 300 mg per day is safe).
All claims are based on the supplied abstracts (PMID 41083806, 37068054, 37619764, 34497121, 34843394, 37848251, 26785480, 24786309). The human studies are limited in size; most mechanistic evidence comes from cell and animal research.
Which is better for raising NAD+: NMN or NR?
NMN and NR raise NAD+ equally well, so the choice between the two probably makes no difference to the end result. Whether that rise in NAD+ actually does anything for your health is far from certain.
What does a NAD supplement do, and does it work in people?
NAD supplements demonstrably raise NAD levels in your blood, but whether you actually benefit from that remains uncertain. If you want to try them, keep your expectations realistic and choose a dose with the best available evidence behind it.
Does a NAD+ infusion do something that an NMN pill does not?
No study directly compares a NAD+ infusion with an oral NMN pill, so an advantage of the infusion has not been demonstrated. Oral NMN demonstrably raises blood NAD+ levels, but whether you notice any health benefit from this remains unclear for now.
Which supplements or medications are best not combined with NAD+?
The combination of NAD+ supplements, particularly nicotinamide, with platinum-based chemotherapy is the most concrete reason for caution. For other interactions the indications are preliminary, but worth discussing if you use multiple substances.
What does NAD+ do for your brain?
NAD+ matters for your brain and declines with age. Whether topping it up via NMN (a substance your body converts into NAD+) or other means actually helps has not yet been convincingly demonstrated in people. Wait for the results of larger studies in people before drawing firm conclusions.
What is NAD+ and what does it do in your body?
NAD+ is an indispensable molecule for energy, DNA repair and cell maintenance, and its levels measurably decline with age. Whether that decline can be corrected with supplements, and what benefit that would bring, is a separate question.