Study Highlights Dementia Risk Linked To Ultra-Processed Foods

Key Points:

• A new study published in Alzheimer’s & Dementia links higher consumption of ultra-processed foods to declines in attention and mental processing speed, even among people who otherwise follow healthy diets.
• Ultra-processed foods, which include packaged snacks and ready-made meals, often contain additives and chemicals that may contribute to inflammation, metabolic dysfunction, and vascular injury, all of which are risk factors for cognitive decline and dementia.
• The study analyzed over 2,100 middle-aged and older Australians and found that every 10% increase in ultra-processed food intake corresponded with measurable cognitive decline and increased dementia risk factors.
• Experts emphasize that diet quality matters for brain health, recommending whole-food diets like the Mediterranean or MIND diets, while cautioning that healthy foods may not fully offset the negative effects of high ultra-processed food consumption.
• Attention deficits linked to ultra-processed foods are significant because attention is a foundational brain function influencing memory and learning, and persistent changes in attention should prompt medical evaluation.