Blood biochemistry: what the analysis shows and how to prepare for the study

What is a biochemical blood test?

Biochemical blood test is one of the most important laboratory tests that allows you to assess the condition of the body, the functioning of internal organs, and also identify various metabolic disorders. It is used to diagnose a wide range of diseases, including diseases of the liver, kidneys, cardiovascular system, and endocrine disorders.

This test measures the levels of proteins, enzymes, lipids, electrolytes, vitamins, and minerals in the blood. It is used to assess overall health, monitor treatment effectiveness, or detect hidden pathologies.

What indicators does it evaluate? blood biochemistry

The study covers a wide range of biochemical parameters that help obtain information about various organs and systems of the body.

Main indicators of biochemical blood analysis

Carbohydrate metabolism

• Glucose – the main source of energy for cells. High levels may indicate diabetes or insulin resistance, while low levels may indicate hypoglycemia.

Protein metabolism

• Total protein – reflects the balance of protein metabolism and liver condition.
• Albumin – the main blood protein that maintains osmotic pressure and transports nutrients.

Liver function

• Alanine aminotransferase (ALT) – an enzyme that is involved in amino acid metabolism. Its elevation indicates liver damage.
• Aspartate aminotransferase (AST) – an enzyme that indicates the condition of the heart muscle and liver.
• Total bilirubin – a pigment that is formed during the breakdown of red blood cells. Its increase may indicate liver or biliary tract dysfunction.

Kidney function

• Urea – the end product of protein metabolism, which is excreted by the kidneys.
• Creatinine – a marker of kidney function that reflects the glomerular filtration rate.

Lipid metabolism

• Total cholesterol – an important component of cell membranes and a precursor of steroid hormones.
• Low-density lipoproteins (LDL) – the so-called “bad cholesterol”, which can contribute to the development of atherosclerosis.
• High-density lipoproteins (HDL) – “good cholesterol”, which removes excess lipids from the body.

Water and salt balance

• Potassium, sodium, calcium, magnesium – essential electrolytes that regulate the functioning of the heart, muscles, and nervous system.
• Iron – a necessary trace element for the synthesis of hemoglobin and oxygen transport.

Enzymatic activity

• Alkaline phosphatase (ALP) – an enzyme involved in the mineralization of bone tissue.
• Gamma-glutamyltransferase (GHT) – an important indicator of the condition of the liver and biliary tract.

When is a biochemical blood test prescribed?

A biochemical blood test is prescribed in various situations:

• in general medical examination
• if a metabolic disorder is suspected
• to monitor the effectiveness of treatment for liver, kidney, and heart diseases
• in cases of diagnosis of inflammatory processes
• if diabetes or micronutrient imbalance is suspected

This analysis helps not only to diagnose pathologies, but also to predict possible health risks and take timely measures to correct them.

How to prepare for the analysis

To obtain the most accurate results, you must follow certain rules before donating blood:

• Do not eat for 8-12 hours before the test. – food intake can affect glucose, lipids, and certain enzymes.
• Do not drink coffee, tea or alcohol the day before the test. – these drinks can distort enzyme and glucose levels.
• Avoid physical exertion – active training can increase enzyme and electrolyte levels.
• Stop taking medication (with the approval of your doctor) – some drugs can affect biochemical indicators.
• Donate blood in the morning – the body's biological rhythms can affect the levels of certain substances in the blood.

How to interpret the results

The assessment of biochemical blood tests is carried out taking into account age, gender, general health and the presence of concomitant diseases.

• High glucose levels can be a sign of diabetes or insulin resistance.
• Elevated cholesterol levels indicate a risk of developing cardiovascular disease.
• High levels of urea and creatinine may signal kidney dysfunction.
• Abnormal liver enzyme levels (ALT, AST) may indicate inflammatory or degenerative changes in the liver.

The results of the analysis should be evaluated comprehensively, since only one abnormal result does not always indicate a serious illness.