Chronic stress elevates cortisol levels, which is one of the main causes of brain cell death. A recent study found evidence of a link between the hormone cortisol and the speed of decline among Alzheimer’s patients. Higher levels of cortisol correlate with shrinkage of the brain’s hippocampus, which is associated with long-term memory.
Actions you take to reduce your stress, such as exercising and eating brain- healthy foods, reduce cortisol levels. In addition, fish oil supplements and an herbal supplement called ashwagandha (also known as Indian ginseng) have both been shown to help reduce cortisol levels. Prebiotic and probiotic supplements show promise of reducing cortisol levels as well.