Nr (Nicotinamide Riboside) for Muscle Recovery

Research suggests that the evidence for NR supporting muscle recovery is limited and mixed. The most directly relevant study — a randomized, double-blind, placebo-controlled trial in older adults — found that NR combined with pterostilbene had no measurable effect on muscle stem cell recruitment, fiber repair, or recovery markers following controlled muscle injury, despite the body's own repair processes being clearly activated. The remaining studies touching on NR or related NAD-precursor compounds were conducted in different contexts entirely, including a mouse model of vascular disease, a COVID-19 recovery trial, and a review of lipid-modulating drugs in COVID-19, making their relevance to human muscle recovery indirect at best. Overall, the available human trial evidence does not currently support NR as an effective aid for skeletal muscle recovery, though researchers note the compound appears safe and acknowledge that findings from a single trial in older adults may not apply to all populations or conditions.