Apples are an important ingredient in many desserts, such as apple pie, apple crumble, apple crisp and apple cake. They are often eaten baked or stewed, and they can also be dried and eaten or re-constituted (soaked in water, alcohol or some other liquid) for later use. Puréed apples are generally known as apple sauce. Apples are also made into apple butter and apple jelly. They are also used (cooked) in meat dishes.
The proverb "An apple a day keeps the doctor away," addressing the health effects of the fruit, dates from 19th century Wales. 
The apple polyphenol extracts had stronger reducing capacity, antioxidant activity on lipid-peroxidation, and scavenging effects on hydroxyl radical, superoxide anion radical and nitroso than ascorbic acid at the same concentration. In the range of test concentration, the maximum scavenging or inhibition rate of apple polyphenol extracts to linoleic acid auto-oxidation, nitroso, hydroxyl radical generated by Fenton reaction, superoxide anion radical generated by illuminating riboflavin and pyrogallol auto-oxidation was 94.4%, 95.76%, 96.64%, 95.19% and 90.48% respectively. The results suggested that the apple polyphenol extracts was an excellent natural antioxidants, free radical and nitroso scavenger.

The Apple Polyphenol Extracts now are a very strong and useful antioxidant diatary supplements.The Apple Extract used in dietary supplements is derived from the immature fruits of the plant apple tree (Malus domestica).

Benefits
•Anti-oxidant
•Anti-aging
•Anti-cancer
•Free radical scavenging Effects
Mechanism
Referring to the above information.
Safety
Apple Extract is safe
Dosage
•  The typical dose is 300-1500mg per day (usually in 2-3 doses throughout the day).
•  Consult physicians for different condition specifics.