Most fruits have skins. Oranges, oranges, bananas, sugar cane, must be peeled to eat, this will not cause controversy. Here, I'd like to focus on apples and grapes with special health benefits.
Apple contains more pectin, pectin is a soluble fiber, has the function of reducing serum cholesterol. French researchers have discovered that most people eat cholesterol by 10% per day, so there is a saying in the Western saying, "an apple a day and a doctor does not enter the house.". However, pectin does not mainly exist in apple skin. According to a recent study by the American medical community, the scent of green apples helps relieve migraine symptoms, but the scent of green apples is not always on the skin. On the other hand, we will see a layer of white things often in apple skin, in fact it may be pesticide residues. Therefore, eating apples not only peel, but also should be washed with water first, then peeled with a knife, so that it is safe to eat.
If the apple should be removed from the skin, then the grape skin is appropriate to retain. Scientists have long discovered that proper drinking of red wine is good for the body, and the secret lies in the skin of grapes. Grape skin contains a chemical called resveratrol, which is similar in structure to synthetic estrogen and acts as a protective organ for the heart. Therefore, eating grapes should not be peeled, and then rinse with water and then soak for 30 minutes, then rinse with cold water, and even eat the skin.
As for no skin strawberries, strawberries and other fruits, it is best to use Potassium Permanganate solution soak for 15 minutes, then rinse with cool boiling water to eat.