How is the research on the medicinal value of apples progressing?

The following is the research progress of the medicinal value of apples:
Cardiovascular protection
Cholesterol reduction: Studies have found that dietary fibers such as pectin in apples can bind cholesterol in the gut and prevent it from being absorbed by the body, thereby reducing cholesterol levels in the blood. For example, French researchers have tested that eating apples can reduce blood cholesterol content, increase bile secretion and bile acid function, avoid cholesterol precipitate to form gallstones, and more than 50% of people who often eat apples have a cholesterol content 10% lower than those who do not eat apples.
Regulating blood pressure: the characteristics of high potassium and low sodium of apple can partially neutralize the high salt diet of modern people, helping to stabilize blood pressure, which potassium ions can promote the discharge of sodium, balance the proportion of sodium and potassium in the body, and then play the role of expanding blood vessels and reducing blood pressure.
Prevention of cardiovascular disease: Oxford University researchers confirmed that an apple a day to prevent heart attack effect is equivalent to taking statins, eat two apples a day or drink a cup and a half of pure apple juice, can reduce the blood "bad cholesterol" content, prevent artery embolism, often eat apple people have a 40% lower chance of myocardial infarction than those who do not eat.
Cancer prevention
Antioxidant effect: Apples are rich in a variety of antioxidant substances, such as vitamin C, flavonoids, etc., with antioxidant, anti-inflammatory, anti-fatigue and other effects, can reduce the damage of free radicals to the body, including quercetin and other flavonoid nutrients, can reduce the risk of a variety of cancers including lung cancer and breast cancer.
Anti-cancer activity: polyphenols in apples have anti-cancer effects, have an inhibitory effect on a variety of cancer cells, Finnish scientists found that flavonoids contained in apples is a highly effective antioxidant, but also a cancer killer, people eat more apples, the chance of lung cancer can be reduced by 46%, the chance of other cancers can be reduced by 20%.
Digestive system
Promote digestion: Organic acids in apples, such as malic acid, citric acid, etc., can stimulate the secretion of gastric juice, enhance gastrointestinal peristalsis, improve gastrointestinal digestive function, and the dietary fiber it contains can increase the volume of feces, promote intestinal peristalsis, and help prevent and relieve constipation.
Antidiarrheal effect: the astringent effect of the pectin in the apple is enhanced after heating, and the components such as malic acid also have a certain astringent effect, which can absorb toxins and bacteria in the intestine, reduce the stimulation of the intestinal mucosa, so as to play an antidiarrheal effect, and have a certain auxiliary treatment effect for children's diarrhea.
Nervous system
To improve sleep: Apples contain a certain amount of tryptophan, which is one of the raw materials for the synthesis of melatonin. Eating apples in a moderate amount can help increase the synthesis of melatonin, thus improving sleep quality. The volatile components in the aroma have a soothing effect on the nervous system, which can make people feel relaxed. Help insomniacs fall asleep.
Relieve stress and anxiety: The aroma of apple contains some volatile components, which can stimulate the olfactory center of the limbic system of the brain, making people feel relaxed, when people are in a state of stress or anxiety, smell the aroma of apple or eat an apple, may relieve tension to some extent.
Other aspects
Strengthen bones: apples contain mineral elements that can strengthen bone boron and manganese, menopausal women if they take 3 grams of boron every day, then their calcium loss rate can be reduced by 46%, menopausal women eat more apples, is conducive to calcium absorption and utilization, can prevent osteoporosis.
Boost immunity: Nutrients such as vitamin C in apples can stimulate the production of white blood cells, which are an important part of the human immune system and can engulf and destroy pathogens, thereby helping to enhance human immunity and improve resistance to disease.
Adjuvant diabetes treatment: The pectin and dietary fiber in apples help reduce blood sugar levels and can be used as an adjuvant treatment for diabetes, which can delay the absorption of sugar and help stabilize blood sugar.