Nowadays, people pay more and more attention to the health of daily diets. They have realized that if they eat foods improperly, it may lead to diseases and even cancer. In the following section, we will introduce six combinations of foods that may cause diseases.

First, fruits and seafood--lead to indigestion
If you eat fruits such as grapes, hawthorns, pomegranates and persimmons when eating seafood, it will lead to vomiting, abdominal distension, abdominal pain and diarrhea. Because these fruits contain tannic acid, which will precipitate when react with the protein in seafood, and then form into substances which are difficult to be digested. As a result, you should not eat these fruits until more than four hours after eating seafood.

Second, ham and lactic acid drinks--cause cancer
If you often eat sandwiches and yogurt for breakfast, you should be careful. Because when the ham and bacon in sandwiches react with the lactic acid drinks (containing organic acids), it may lead to cancer. Because, in order to preserve sausage, ham, bacon and other processed meat products, many food manufacturers will add nitrates to prevent the spoilage of food. When the nitrate runs into organic acids (such as lactic acid, citric acid, tartaric acid, malic acid, etc.), it will change into a kind of carcinogen--nitrosamine. Therefore, do not often eat these processed meats, so as not to increase the risk of cancer.

Third, spinach and tofu--lead to stone disease
Tofu contains magnesium chloride and calcium sulfate, and spinach contain oxalic acid. When these two kinds of food meet with each other, they can form into magnesium oxalate and calcium oxalate. These two kinds of white precipitate can not be absorbed by the body, which not only affects the human body to absorb calcium, but also make people easily suffer from stone disease.

Fourth, chocolate and milk--easily lead to diarrhea
Milk is rich in protein and calcium, while chocolate contains oxalic acid. If you eat these two kinds of food together, the calcium in milk and oxalic acid in chocolate will form into calcium oxalate, which is insoluble in water. It is not only difficult to be absorbed by the body, but also may cause diarrhea, dry hair and other symptoms, affecting the growth and development of the body.

Fifth, radish and orange--induce goiter
Radish will produce an anti-thyroid substance--thiocyanate. If you eat large amounts of oranges, apples, grapes and other fruits at the same time, the flavonoids contained in the fruits will change into thiocyanate after they are decomposed by the bacterial in the intestines, thus inducing goiter.