Damages of natural juices are not just an exaggeration, it is true that juice is very useful for health, but it should not be a substitute for any other source of food.
Juice is a liquid found naturally in the tissues of vegetables or fruits. These liquids are extracted at the time, and there is no need for heat in this process.
Juices contain essential nutrients that are good for health, such as minerals and vitamins. For example, orange juice is rich in antioxidant vitamin C, while cranberry juice helps protect against urinary tract infection, but there is some natural juice damage:

High blood sugar

Raw fruit juice contains a high glycemic index, which means that the diet makes carbohydrates run quickly, because of the absence of fiber. The body absorbs sugar faster than it does when eating vegetables or whole fruit, which leads to a rapid escalation of blood sugar and the emergence of complications especially in patients with diabetes and other diseases of the glycemic disorder. Eating whole grains help to slow the body’s absorption of sugar, this is because during the consumption of the fruit pill, it takes time and energy, and the whole grain contains the fiber that helps to feel full.
Juices harm dental health:
Some studies have confirmed that the enamel layer found in the teeth may be damaged when consuming large amounts of juices, because some of the juices contain a high proportion of acids produced by bacteria that feed on sugar, so should pay attention to the health of teeth by washing them after drinking juices, and reduce drinking juices and replace them by eating the whole grain.

Intestinal constriction

The freshly squeezed juice of certain fruits, such as sweet cherries, has a high concentration of sorbitol, a form of indigestible sugar, naturally found in the fruit, according to some specialists. Therefore, the body can not naturally digest this sugar, but the vital bacteria in the digestive system product gases that cause puffiness and discomfort, and sometimes sorbitol enters large quantities into the water in the intestine and contributes to the production of loose stool (diarrhea).
Exposure to diseases
Drinking juices from fruit or vegetables that are not properly washed or inadequately stored may expose the person to bacterial diseases, 43% of the samples of fresh orange juice contain high levels of vitamins (A class of germs) more than allowed. 0.5% and 1% of these samples include salmonella.
While the immune system can deal with these bacteria most of the time, there are some cases that suffer from the vulnerability of immunity, such as children and elderly people who are vulnerable to disease by eating these contaminated juices.

Weight gain:

Some fruit juices, such as orange and pineapple, have a high sugar content, combined with the absence of dietary fiber, which causes a rise in calories, leading to weight gain. Studies have shown that the body’s calories from fluid cause weight gain, as opposed to the body’s calories from solids, which are lower, and studies have confirmed that the risk of childhood obesity increases by 60% when eating juices periodically, They also lead to heart disease.

Loss of appetite for food:

Eating natural juices means that the body lacks the nutrients it needs to maintain its health. It contains high levels of sugar, which causes anorexia to eat. Therefore, the body does not get the nutrients it needs to enter its body through eating healthy food.
Fruit juice is not as nutritious as fresh fruit, but it can be a healthy part of your diet if consumed in small amounts. Eating a cup of fresh orange juice or a grapefruit juice with breakfast gives you a feeling of recovery, but also provides a healthy dose of vitamin C and potassium, which is especially useful if people prefer not to eat fruit in their natural form, but fruit juice is still a major source Of sugar and calories, which can cause health problems for people who wish to reduce their weight, or reduce blood sugar. Also, fruit juice lacks the fiber in the whole fruit, which means that we don’t only lose health benefits of fiber, which include their ability to lower cholesterol and help to feel full, but also experience a rapid increase in blood sugar after the consumption.