Blue has no more secrets: scientists decipher the colour code of blueberries

Scientists at the University of Bristol have unravelled the mystery behind the blue colour of blueberries. The blue hue is not due to the fruit's pigment, but results from tiny crystalline structures within the wax covering the berry, which reflect light in a specific way, creating a blue hue. This phenomenon also applies to other blue foods such as sloes,

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