What does NMN do for the body?

From the high-end consumer market to cutting-edge scientific laboratories, NMN is hailed as a star molecule with the potential to reverse aging. However, to dispel the fog of marketing, as rigorous industry practitioners and researchers, we must return to the cornerstone of science and explore a core question: what exactly does NMN do to the human body?

To understand the role of NMN, one must first recognise NAD+(nicotinamide adenine dinucleotide).

NAD+ is a crucial coenzyme in the human body, present in every living cell and involved in hundreds of critical physiological activities. It is not only the core of cellular energy metabolism (such as the tricarboxylic acid cycle and oxidative phosphorylation), but also an indispensable "fuel" for maintaining life processes, including DNA repair, cell signalling, and gene expression regulation. Multiple basic studies have already confirmed that with age, the level of NAD+in the human body systematically decreases, which is considered one of the key driving factors leading to aging and related functional decline, such as metabolic disorders and increased risk of neurodegenerative diseases.

Theory must ultimately be tested through practice. Fortunately, from 2020 to 2024, a large number of high-quality human clinical trials have emerged globally, providing valuable data for us to evaluate the actual effectiveness of NMN.

The evaluation of any supplement begins with safety. Multiple clinical studies have consistently shown that NMN exhibits good safety and tolerability in the human body.

• Evidence: For example, a study published in the Endocrine Journal in 2020 by Keio University School of Medicine in Japan conducted a 12-week, single oral trial of 100mg, 250mg, and 500mg NMN in healthy men. The results showed that core physiological indicators such as heart rate, blood pressure, and body temperature did not show significant fluctuations, and no serious adverse events related to NMN were reported.

Overall, existing clinical evidence generally supports that daily supplementation doses of up to 1250 milligrams of NMN are safe. Although studies have shown a slight increase in reports of mild adverse events (such as gastrointestinal discomfort) at doses of 1000mg/day or higher, overall, no serious safety hazards have been identified.

Can NMN effectively increase human NAD+levels? The answer is affirmative, and this is currently the most conclusive conclusion based on clinical evidence.

• Evidence 1: A large randomised, multicenter, double-blind, placebo-controlled clinical trial published in the authoritative gerontology journal Geroscience in 2023 provides us with strong evidence. The study was led by Yi L et al. and included 80 healthy middle-aged adults who were given 300mg, 600mg, and 900mg of NMN supplements daily. The results showed that after 30 and 60 days of supplementation, the whole blood NAD+concentrations of all NMN groups showed a statistically significant increase (p ≤ 0.001) compared to baseline and placebo groups, and this improvement effect exhibited a clear dose-dependent pattern.
• Evidence 2: Another study provided more specific values: with a baseline average whole blood NAD+level of 23.8 ± 5.5 μM, subjects who supplemented with 1000mg NMN daily had their NAD+levels increased to 58.8 ± 21.1 μM, more than doubling.

These data irrefutably confirm the effectiveness of oral NMN as an NAD+supplementation strategy.

By the end of 2025, the scientific community's answer to the question of "what are the effects of NMN on the human body?" will have become increasingly clear. As a safe and effective precursor of NAD+, NMN's ability to enhance human NAD+levels has been fully clinically validated. On this basis, it demonstrates potential for improving metabolic health, enhancing physiological functions, and improving sleep in specific populations. Although further research is needed to clarify its universal effects on blood glucose and blood lipids, as well as its longer-term anti-aging effects, NMN is undoubtedly one of the most exciting achievements in the field of aging science translation in recent years.

For more details about NMN, connect with Serrisha from APPCHEM. (Email: cwj@appchem.cn; +86-138-0919-0407)

Reference

[1]Tomas Schmauck-Medina, Adrian Molière et al. "New hallmarks of ageing: a 2022 Copenhagen ageing meeting summary." Aging (Albany, NY) (2022). [2022-08-29]

[2]Sajid ur Rahman, Abdul Qadeer et al. "Role and Potential Mechanisms of Nicotinamide Mononucleotide in Aging." Aging and Disease (2023).

[2023-07-27]

[3]NMN "Nicotinamide Mononucleotide" Activates Intracellular Energy and Approaches the Prevention and Improvement of Aging. Satoshi Kawakami et al. [2022-05-20]

[4]Improved Physical Performance Parameters in Patients Taking Nicotinamide Mononucleotide (NMN): A Systematic Review of Randomised Controlled Trials. Jimmy Wen et al. [2024-08-01]

[5]The Safety and Antiaging Effects of Nicotinamide Mononucleotide in Human Clinical Trials: an Update. Qin Song et al. [2023]