Dietary flavonoids and vitamin D linked to lower neurodegenerative disease risk

New research suggests dietary components may play a role in reducing the risk of neurodegenerative diseases. A prospective study using the UK Biobank, published in Frontiers in Nutrition, indicates that diets rich in flavonoids—found in foods such as berries, citrus fruits, tea, and dark chocolate—are associated with a slightly lower risk of hospital-recorded Parkinson's disease incidents.

Separately, research into Alzheimer's disease highlights the potential roles of vitamin D and green tea. A meta-analysis published in Frontiers in Neurology, covering 22 observational studies and over 53,000 participants, found that low blood levels of vitamin D are associated with an approximately 49% increase in dementia risk. While vitamin D3 may help regulate brain immunity and inflammation, and green tea provides antioxidant polyphenols, researchers note that current findings are based on statistical associations rather than definitive proof of prevention.