CBC vs CMP - what's the difference?
The two most common panels, but about different things: a CBC is about your blood cells, a CMP about metabolism and organs. Here's what each includes.
CBC (complete blood count)
Evaluates your blood cells - red cells, white cells, platelets. Flags anemia, infection, inflammation.
CMP (metabolic panel)
~14 markers: glucose, electrolytes, kidney and liver function, protein. About metabolism and organ function.
Key differences
- CBC is about blood cells; CMP is about biochemistry and organs.
- Different markers - often ordered together at a check-up.
- CBC usually needs no fasting; a CMP often does (because of glucose).
- Neither replaces the other - they complement.
Bottom line
They're not competitors: a CBC looks at blood cells, a CMP at metabolism. A general check-up often draws both.
Frequently asked questions
Do I need both?
At a routine check-up, often yes - they cover different systems. Your doctor decides the exact set.
Which one matters more?
It depends on the question: fatigue/infection → a CBC is more telling; kidney/liver/sugar → a CMP.
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