Apple and its myth. Will an apple a day able to keep the doctor away?

Does eating an apple every day really keep the doctor away? As we all know Apples are delicious and nutritious and certainly popular.
“An apple a day keeps the doctor away” is an old Welsh proverb that most of us are familiar with, but is the food that grows in cold regions actually beneficial for the people residing in the western region as well?
The cold regions of the country, the state of Jammu and Kashmir and Himachal Pradesh are the leading apple producing states in India. Jammu and Kashmir has gained much popularity for the different varieties of apples produced and today it is popularly known as the ‘Apple State of India’.
As the fruit is easy to store and is supplied all over the country in all seasons, are we getting it as fresh and healthy as other local fruits that we have?
No doubt Apples are extremely rich in important antioxidants, vitamins, flavanoids and dietary fiber, but like other fruits if eaten in excess, apples too may contribute to weight gain.
Furthermore, apples are acidic and its juice may damage tooth enamel. Snacking on acidic food throughout the day damages teeth in an extreme way.

An apple a day is good, but taking all day to eat the apple can damage teeth.
Most apples have pesticides in them, unless they are certified organic. Researchers said that conventional apples had pesticide residue on their peels. However, the group also said that the health benefits of a diet rich in fruits and vegetables outweigh the risks of pesticide exposure.
Apple seeds, also called pips, contain a chemical compound called amygdalin, which can release cyanide, a powerful poison, when it comes into contact with digestive enzymes. Whole seeds pass through your digestive system relatively untouched, but if you chew the seeds you may be exposed to toxins. One or two will not be harmful, as the body can handle small doses of cyanide, but if you or a child chews and swallows a lot of seeds, you should seek medical attention immediately.
Inspite of having these side effects, how can apple be so popular? How can apple keep the doctor away? There still remains a mystery behind it.