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Potassium is an essential salt for the body. It regulates, among other things, the body’s fluid balance.
GFR (glomerular filtration rate)
GFR (Glomerular Filtration Rate) test reflects the kidneys’ ability to cleanse the blood, that is, their ability to remove excess water and waste material from the body.
Glomerular filtration rate (GFR) and kidney health
- Glomerular filtration rate (GFR) reflects kidney health.
- GFR test is a more accurate measure of kidney function than creatinine alone.
- Abnormally low GFR indicates kidney dysfunction.
Kidney function measurements
Kidney function has long been assessed through creatinine measurements. However, glomerular filtration rate is a more accurate measure of kidney function than just creatinine.
Why is GFR measured?
GRF test reflects the ability of the kidneys to purify the blood from excess water and waste products.
GFR is measured to determine or to monitor kidney function. It is measured when assessing overall health, determining the causes of abnormal symptoms, in the context of kidney-affecting diseases (for example diabetes, hypertension, and other cardiovascular diseases), and when starting or adjusting medications that may affect the kidneys.
Reference values for GFR
GFR is influenced by the same factors as creatinine. Creatinine comes from muscles, which is why high muscle mass raises creatinine level and low muscle mass decreases it.
Men produce more creatinine than women because men have more muscle mass than women.
Age also influences the values as kidney function naturally deteriorates and muscle mass often decreases with age.
Due to the formula, decreased kidney function is manifested as an increase in creatinine but a decrease in GFR.
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Sodium is one of the most important salts in the body. It is essential for life, being a key substance in maintaining the membrane tension of all cells.
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Creatinine is measured to determine or monitor kidney function. The creatinine value increases if its excretion in the kidneys is impaired.
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Cystatin C reflects kidney function
Cystatin C is a small protein formed in the body’s cells, with the task of inhibiting the breakdown of certain proteins. Cystatin C is filtered and excreted by the kidneys, and measurement of cystatin C is therefore used to assess kidney function.
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ALAT – reference values and liver health
Alanine aminotransferase (ALAT) is an indicator of the well-being of the liver. It reacts to long-term alcohol use and fatty liver disease caused by excess weight, for example.
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ASAT, or aspartate aminotransferase, indicates the condition of the liver
High ASAT may indicate tissue damage in important organs.
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Albumin reflects the body’s fluid balance
Albumin is produced in the liver and has two important functions: regulating the body’s fluid levels and transporting essential nutrients to the body’s tissues. Reduced levels of albumin can be seen in conditions such as physical inactivity and malnutrition.
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Creatinine (Crea)
Creatinine value helps assess kidney function.
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GT is a liver enzyme that describes the health of the liver
GT is one of the standard tests used to assess the health of the liver and bile ducts, especially when there is suspicion of alcohol-related health issues. More GT is produced by liver cells when they are under stress, such as in liver diseases or heavy alcohol consumption.
Article updated:
14 May 2024
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