Kidney Function & Electrolytes
Kidneys filter the blood, balance salt and water, and control blood pressure. These tests check how well they clean and balance.
- Creatinine
A waste product from muscle activity that the kidneys filter out.
- Urea
Waste product from protein breakdown — made by the liver, removed by the kidneys.
- eGFR (Estimated Filtration Rate)
An estimate of how many millilitres of blood your kidneys filter every minute.
- Sodium
The main salt outside your cells — controls fluid balance and nerve signals.
- Potassium
The main salt inside cells — vital for nerve and especially heart rhythm.
- Chloride
A salt that partners with sodium to keep fluid and acid-base balance.
- Bicarbonate
The body's main acid buffer — keeps blood pH steady.
- Calcium
Essential for bone, muscle contraction, nerve signals and clotting.
- Phosphate
Partner of calcium in bone — also vital for energy molecules (ATP) and DNA.