- Sodium and fluid balance
- Potassium
- Vitamin D and calcium
- Acid-base balance
- Liver function tests
- Thyroid
- Pituitary
- Adrenals
- Hypoglycaemia
- Diabetes
- Lipids
- Kidneys
- Porphyrias
- Uric acid metabolism
- Metabolic disorders
- Vitamin deficiencies
- Drugs
- Extra stuff