Editors: | F. Kongoli, H. Inufusa, C. Amatore, H. Chen, W. Huang, H. Goor. |
Publisher: | Flogen Star OUTREACH |
Publication Year: | 2022 |
Pages: | 152 pages |
ISBN: | 978-1-989820-62-9(CD) |
ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Nicotinamide adenine dinucleotide (NAD+) is involved in regulating various biological processes and decreased with aging or oxidative stress [1]. Nicotinamide mononucleotide (NMN) increases intracellular NAD+ levels and counteracts age-associated changes [2,3]. We investigated the safety and efficacy of oral NMN supplementation (250 mg/day) in older diabetic patients with impaired physical performance.
We conducted a 24-week placebo-controlled, double-blind study for male diabetic patients aged 65 years or older with reduced grip strength (less than 26 kg) or reduced walking speed (lenn than 1.0 m/sec). We studied 14 participants aged 81.1±6.4 years. NMN was tolerable without any related severe adverse events. The changes in grip strength and walking speed showed no difference between the two groups; However, there were trends toward an improved prevalence of frailty in the NMN group (p=0.066) and different changes in central retinal thickness between the two groups (P=0.051).
In conclusion, in the present study performed on older male diabetic patients with physically impaired performance, a 24-week administration of 250 mg NMN was safe. Still, it did not affect grip strength or walking speed. However, a subanalysis indicated that NMN has the potential to improve frailty status and central retinal thickness. Directions to improve frailty and retinal thickness with NMN may be a further expected issue to be investigated.