Nowadays, people are very particular about foods, but they rarely realize that if some foods are collocated improperly, it may lead to diseases, even cancer.

First, seafood and beer together will easily induce gout.
Seafood contains purine and nucleotide, while beer is rich in vitamin B1, which is an important catalyst to decompose these two components. As a result, if you drink beer when eating seafood, it will lead to the combination of harmful substances in the body, increase the uric acid level in the blood, thus forming the urinary tract stones, which are difficult to discharge out of human body. What's more, if you have metabolic problem, it may even induce gout, gouty nephropathy, and gouty arthritis.

Second, ham and lactic acid drinks together may easily lead to cancer.
If you eat ham or bacon together with some lactic acid drinks (containing organic acids), it may easily cause cancer, because in order to preserve the processed meat products such as sausage, ham, bacon, etc., many food manufacturers will add nitrates to prevent the spoilage of the food and the growth of clostridium botulinum. When nitrate meets the organic acids (lactic acid, citric acid, tartaric acid, malic acid, etc.), it will transform into the carcinogen——nitrosamine. Therefore, do not often eat processed meat, so as not to increase the risk of cancer.

Third, radish and orange together may easily induce goiter.
Radish will produce an anti-thyroid substance called as "thiocyanate". If you eat large amounts of oranges, apples, grapes and other fruits with radish together, the flavonoids in fruits will change into thiocyanate after being decomposed by the bacteria in the intestinal tract, which will inhibit the function of thyroid, and thus inducing goiter.

Fourth, chocolate and milk together will easily lead to diarrhea.
Milk is rich in protein and , while chocolate contains oxalic acid. If these two kinds of foods are eaten together, the calcium in milk will combine with the oxalic acid in chocolate, forming , which is not dissolve in water. Calcium oxalate not only can't be absorbed by the body, but will also lead to diarrhea, dry hair and other symptoms, and may even affect the growth and development of human body.

Fifth, spinach and tofu together will easily cause stone disease.
Tofu contains magnesium chloride and calcium sulfate, while spinach contains oxalic acid. When these two kinds of foods meet together, they can generate acid magnesium and calcium oxalate. These two white precipitates can not be absorbed by human body, which not only will affect the absorption of calcium by human body, but also may easily lead to stone disease.