Proper nutrition is important to keep the body strong and healthy. For a person with Alzheimer's or dementia, poor nutrition may increase behavioral symptoms and cause weight loss. The basic nutrition tips below can help boost the person with dementia's health and your health as a caregiver.Researchers developed the diet by looking at the Mediterranean and DASH diets, then focusing on the foods with the most compelling findings in dementia prevention. Vegetables, especially leafy greens, rose to the top. In general, fruit didn't, though berries made the list.