Why did your freezer jam turn pink?

Your freezer jam may have turned pink due to a reaction between the fruit's natural pigments and the acidity or sugar levels in the mixture. Certain fruits, like strawberries or raspberries, contain anthocyanins, which can change color based on pH. Additionally, if the jam was exposed to air or light during the freezing process, oxidation could also contribute to the color change. This pink hue is generally harmless and does not affect the taste or safety of the jam.