Coffee extraction is the process by which water dissolves soluble compounds from ground coffee during brewing. These compounds include acids, sugars, lipids, and bitter elements, all of which contribute to flavor, aroma, and body. Extraction does not occur evenly: acids are released...
Coffee science explores the chemical, physical, and biological processes that shape coffee from plant to cup. It begins with botany and agriculture, where genetics, soil, climate, and altitude influence how coffee cherries develop sugars, acids, and aromatic precursors. These natural...
Coffee metabolism describes how the body absorbs, processes, and removes caffeine after drinking coffee. Once consumed, caffeine is rapidly absorbed through the digestive system and enters the bloodstream, usually within 15 to 45 minutes. It then travels to the brain, where it blocks...
Coffee foam is the layer of bubbles that forms on the surface of certain coffee beverages, most famously espresso. This foam, known as crema, is created when hot water under pressure emulsifies coffee oils and traps carbon dioxide released from freshly roasted beans. The result is a fine...
Coffee crema is the golden-brown foam that forms on the surface of a well-extracted espresso. It is created when hot water under high pressure emulsifies coffee oils and traps carbon dioxide released from freshly roasted beans. This layer is rich in aromatic compounds, giving espresso its...
