The shell of fresh mangosteen with black skin is dark purple, but if mangosteen begins to deteriorate, the color of the shell will be dark black. When the color of mangosteen shell changes, it means that mangosteen is not fresh, so avoid choosing this kind when buying mangosteen.

Hard shell can also be judged by pinching mangosteen by hand. Generally, mature fresh mangosteen shells are moderately soft and hard, and can be gently pressed by hand, which is more elastic.

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However, if it is stale or broken mangosteen, its shell will be dry and hard due to the loss of water in the shell, while the sour mangosteen contains a lot of sugar and belongs to the fruit with high sugar content, so normal fresh mangosteen will smell faint fragrance and fruity fragrance.

However, once mangosteen begins to taste sour or alcoholic, it means that mangosteen has deteriorated, and the fresh mangosteen pulp with normal pulp color change is white. However, if the color of mangosteen pulp begins to turn yellow and black, it means that mangosteen has gone bad. Suggest throwing it away immediately.