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    lemon juice

    Lemon juice, a fruit juice, is the juice of lemons (citrus). Fresh lemon juice is obtained by squeezing lemons. Lemon juice, either in natural strength or concentrated, is sold as a bottled product most of the time, usually with the addition of ascorbic acid (vitamin C) and a preservative such as sodium metabisulfite. Lemon juice can be used to make lemonade, and is, along with lime juice, an important part of many cocktails. Lemon juice has a pH of around 2.3 [1] and is good for removing the tarnish from pennies that are made from mainly zinc. It can be used to make cream cheese as it is effective in curdling milk