The main ingredient in cider is apples. Cider is produced by pressing fresh apples to extract their juice and then fermenting that juice using yeast. This fermentation process converts the sugars in the apple juice into alcohol, resulting in the final alcoholic beverage known as cider. Different apple varieties can impart unique flavors and characteristics to the cider, leading to a wide range of styles, from sweet to dry. Additionally, some ciders may include other fruits or spices to enhance their flavor profiles, but apples remain the core component.