Apples contain much more calcium than ordinary fruits, which can help to metabolize excess salt and help to lose weight. However, few people know that the apple kernel contains hydrocyanic acid. Australian researchers found that apple core contains a small amount of harmful substance-hydrocyanic acid. A large amount of hydrocyanic acid deposited in the body will lead to dizziness, headache, increased respiratory rate and other symptoms, which may lead to coma in severe cases. But don't worry too much, the hydrocyanic acid in apples mainly exists in the stone, not in the pulp. Need to be reminded: eating apples is used to gnawing at the core, although it will not cause poisoning immediately, but eating like this for a long time is really bad for your health. Potential "Poisoning" Danger of Apple: Erythropoietin Coloring Nowadays, people often complain that "eating fruit has no fruity taste", because many fruits use excessive growth regulators, erythropoietin and swelling agents in the growth process, or use excessive preservatives in storage, and even use colorants, waxing, bleaching and dyeing in sales to satisfy consumers' psychology of "judging a book by its appearance". These poisonous fruits have become public hazards that seriously threaten people's health. The harm of eating apples: inflation hormone urges you, lycopene adds color, and preservatives keep fresh. Excessive use of dilators, erythropoietin and preservatives can harm the liver. Retailers will also wax apples with industrial paraffin wax to keep them moist and make the fruits bright and attractive. The first is the natural fruit wax on the surface of apple, which is a lipid component and a plant protective layer generated on the surface of apple. Can effectively prevent external microorganisms, pesticides, etc. from invading the dental pulp, play a protective role, and do not need to be removed. The second is the edible wax artificially added by some imported apples. This "artificial fruit wax" is actually a chitosan substance, which is mostly extracted from crustaceans such as crabs and shells. This substance itself is harmless to the body, and its function is mainly to keep fresh and prevent apples from rotting and deteriorating during long-distance transportation and long-term storage. Removing this layer of wax is also very simple, and it can be removed by washing it directly with hot water. The third kind is industrial wax, in which mercury and lead may penetrate into the pulp through the peel and cause harm to the human body. The identification method is: wipe the surface of the peel with hands or napkins. If you can wipe off the faint red substance, it may be industrial wax. Different colors of apples have different health care effects, and the color of apples can predict the health care effect. For example: red apples: more beneficial to the heart, improve memory and maintain the health of the urinary system; Green apples: more conducive to strong teeth and bones; Yellow apple: It can strengthen the human immune system and is also good for preventing some cancers. Traditional Chinese medicine believes that different colors of apples have different health care functions. Red apples enter the heart: the effect of lowering blood fat and softening blood vessels is stronger, which can protect cardiovascular and cerebrovascular health, and the elderly can eat more. Green apple: It has the effect of nourishing liver and detoxifying, and can resist depression, so it is more suitable for young people to eat. In addition, green apples can also promote the growth of teeth and bones and prevent gum bleeding. Yellow apple: It has a good effect on protecting eyesight. Office workers who often use computers can eat properly.