Studies show that an essential nutrient in fish oil does not appear to slow mental decline . A growing body of research suggests that dementia begins decades before any noticeable symptoms surface , and it 's possible that DHA helps prevent or slow those harmful changes . Score: 6 Treatments such as DHA could prevent or slow dementia if started earlier in life .
Studies show that an essential nutrient in fish oil does not appear to slow mental decline . Score: 6 Treatments such as DHA could prevent or slow dementia if started earlier in life .