Change in Disease Score at 52 Weeks, by Group
Year-Long Trial Finds NAD-Boosting Supplement Worsens Early Parkinson Symptoms
A widely used longevity supplement was tested head-to-head against placebo in people newly diagnosed with Parkinson's disease, and it lost.
- 410 randomized, 52 weeks
- 2.72-pt worse vs placebo
- Nonmotor symptoms worsened more
This is a well-run, year-long trial that landed on a clear no. Nicotinamide riboside has real biology behind it, since NAD+ decline is part of aging, but the study found it did not help early Parkinson's and left people with worse movement and nonmotor scores than a sugar pill. I would not recommend it for anyone managing Parkinson's based on this record. For general healthy aging outside Parkinson's, I still favor building NAD+ through diet, sleep, exercise and red light therapy over one isolated compound. Keep taking prescribed dopaminergic medication and talk to your neurologist before adding any supplement.
Source: JAMA · Oct 8, 2026





Build MUSCLE As You Age
Make Time for FAMILY
Healing the SOUL
The Healthcare System Is BROKEN
The SECRET to Longevity
What Cancer Taught Me
Strength Training SAVES


