An apple contains up to 80% water, the remaining 20% are useful substances: fiber, organic acids, potassium, sodium, calcium, magnesium, phosphorus, iron, iodine, as well as vitamins A, B1, B3, PP, C, etc.
Apples contain such important natural acids as malic, tartaric and citric, tannins.
Varieties: Golden Delicious, Granny Smith, Idared,
Red Delicious, Fuji, Modi, Gala, Simirenko,
Chris Pink, Red Jonaprince, Braburn.