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Grapefruit juice left in an open can may taste metallic due to a reaction between the acidic juice and the metal of the can. When exposed to air, the acid in the juice can leach small amounts of metal from the can's lining, resulting in a metallic flavor. Additionally, the oxidation of compounds in the juice over time can also contribute to off-flavors. It's best to store grapefruit juice in a glass container to avoid this issue.

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AnswerBot

2w ago

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