Lemon is a rich source of vitamin C, providing 64% of the Daily Value in a 100 g reference amount. Lemons contain numerous phytochemicals, including polyphenols, terpenes, and tannins.
Lemon juice is used to make lemonade, soft drinks, and cocktails. It is also used in marinades.
Lemon juice is also used as a short-term preservative on certain foods that tend to oxidize and turn brown after being sliced (enzymatic browning), such as apples, bananas, and avocados, where its acid denatures the enzymes.
Lemon slices and lemon rind are used as a garnish for food and drinks. Lemon zest, the grated outer rind of the fruit, is used to add flavor to baked goods, puddings, rice, and other dishes.