Urine is an aqueous solution of the breakdown products of protein substances and various salts that precipitate. The presence of a certain type of salt crystals in the urine indicates a change in pH in one direction or another. An acidic environment causes the formation of urates, an alkaline environment - phosphates. With normal other indicators of urine, the presence of salts is not considered a sign of any disease.
An excess of salts (urates, phosphates or oxalates) leads to the appearance of stones and, as a result, to the development of urolithiasis.
This happens due to metabolic disorders, unbalanced nutrition.
Precipitation of urates occurs when the body is dehydrated (for example, during a period of heat and insufficient drinking regime, due to profuse vomiting, diarrhea, etc.) or when meat food predominates in the diet.
Phosphates appear when eating foods rich in phosphorus (fish, sour milk, oatmeal, buckwheat, etc.).
Oxalates occur in any pH reaction, but with excessive consumption of products containing large amounts of oxalic acid.