Nicotinamide Riboside Augments the Aged Human Skeletal Muscle NAD+ Metabolome and Induces Transcriptomic and Anti-inflammatory Signatures (Brenner, August 2019)
12 male humans aged 70-80 years old were given 1,000 mg of Nicotinamide Riboside (NR) per day for 3 weeks.
NR supplementation had no effect on levels of NR circulating in the bloodstream.
- NR was found at trace levels in the blood
- NR levels were unchanged after supplementation
We review this research, along with 3 other new studies that show NMN is more stable and present in blood at much higher levels than NR.
https://alivebynature.com/nr-limited-by ... oodstream/