Apples have a very low energy value as well low protein low fat or saturated fat have non colesterol but carbohydtates are very high same as fiber
Apples sour taste comes from malic acid and depends on different apples. Apple seeds contain amygdalin and cyanide that can be dangerous or fatal to humans and in special to children’s.
Buy apples without bruises and store them in a dark, cool temperature room with planty of air circulation
Cooking apples destroy its fiber and vitamin C . Best to serve an apple is plain.