New Review Examines Whether Supplements Can Help Slow Parkinson's Disease Progression

The search for a treatment that can slow Parkinson's disease may be expanding beyond prescription drugs and into the kitchen cabinet. A new scientific review suggests certain dietary supplements could help target biological processes linked to the disease, though researchers caution that evidence remains limited and no supplement has yet been proven to stop progression.

Published in the Journal of Parkinson’s Disease, the review examined human clinical trials investigating whether supplements can modify pathways involved in Parkinson’s disease, including inflammation, oxidative stress, mitochondrial dysfunction, and gut microbiome imbalance.

Parkinson’s disease is the world’s fastest-growing neurological disorder and is expected to affect far more people by 2050. Current medications help control symptoms, but they cannot stop the ongoing loss of dopamine-producing brain cells.

Researchers found that omega-3 fatty acids, particularly when combined with vitamin E, showed some of the most promising early results. Several studies reported reduced inflammation, improved antioxidant defenses, and modest improvements in Parkinson’s symptom scores.

Another supplement attracting attention is nicotinamide riboside, a form of vitamin B3 linked to mitochondrial health. Since mitochondrial dysfunction is believed to contribute to Parkinson’s progression, scientists have explored whether boosting cellular energy production could help protect brain cells. Some trials using higher doses showed improved motor scores, though results have been inconsistent.

The review also examined probiotics and other “biotics” that target the gut microbiome. Digestive problems often appear years before Parkinson’s motor symptoms, leading scientists to suspect the gut may play an important role in disease development. Several studies found that probiotics reduced inflammation and improved some symptoms, especially multi-strain formulations.

Researchers stress that dietary supplements should not replace standard Parkinson’s treatment. Instead, they may eventually become part of broader strategies that combine medication, nutrition, exercise, and gut health support.

REFERENCE: Prasad, A., Shuler, M. S., Flanagan, R., Dayal, V., & Lithander, F. E. (2026). Dietary supplements for Parkinson's disease: State of the science. Journal of Parkinson’s Disease. DOI: 10.1177/1877718X261446386, https://journals.sagepub.com/doi/epub/10.1177/1877718X261446386