There are many myths regarding the properties and nutritional content of frozen fruit. It has been scientifically proven that by flash freezing shortly after harvesting, berries retain all of their goodness and in fact, as they are preserved in this way when they are at their peak, their goodness is locked in until being eaten. However, ripe fruit on a supermarket shelf slowly declines when it comes to nutrition, especially as it approaches its best before date and use by date.