Caffè Americano or simply Americano (the name is also spelled with varying capitalization and use of diacritics: e.g. Café Americano, Cafe Americano, etc.) is a style of coffee prepared by adding hot water to espresso, giving a similar strength to but different flavor from brewed coffee. The drink consists of a single or double-shot of espresso combined with between 1 and 16 fluid ounces (30–470 ml) of hot water. The strength of an Americano varies with the number of shots of espresso added. In the United States, "Americano" is used broadly to mean combining hot water and espresso in either order. Variations include long black and lungo.
A 28-year study, eventually published in 2017 in Alzheimer's and Dementia, the journal of the Alzheimer's Association, determined that four to five cups of a coffee a day – a level deemed "moderate" – led to a decreased risk of dementia during that time period. Those who drank coffee in moderate levels had less medial temporal atrophy, which is linked to Alzheimer's disease, compared to those who drank three or fewer cups a day, including those who didn't drink any.