Black coffee can have many health benefits, including: 1) Improved mental alertness: Black coffee's caffeine can help you focus and pay attention. This can help older people reduce their risk of Alzheimer's disease. 2) Improved cardiovascular health: Black coffee can help improve blood circulation, which may reduce the risk of heart stroke and cardiovascular disease. 3) Improved digestive health: Black coffee can help stimulate the production of hormones that help break down food in your stomach

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