• As the population ages, disorders affecting the nervous system, including cognitive decline and dementia, are the leading cause of overall disease burden worldwide.
• Diet and lifestyle can affect a person’s risk of developing cognitive decline as they age.
• Vitamins and minerals, such as vitamins B and C, calcium, magnesium, and zinc, are essential in maintaining cognitive function.
• A new study suggests that dietary copper intake may also be important, with too little or too much negatively affecting cognitive function.

Written by Katharine Lang on July 23, 2025 — Fact checked by Jill Seladi-Schulman, Ph.D.

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