Most people should get the high sensitivity CRP test, or hs-crp.
The lower crp is the better. If you have something like rheumatoid arthritis your crp is likely to be above 10.
An hs-CRP level greater than 2.0 mg/L puts you at greater risk of a heart attack.
Levels between 3 mg/L and 10 mg/L are mildly elevated and usually result from chronic conditions such as diabetes, hypertension, or things like tobacco smoking and being sedentary.
High-calorie, high-fat meals cause a sudden spike in CRP, high triglycerides can cause a spike up.
Problem is that while hs-crp indicates some sort of inflammatory response, you can't exactly tell what is causing it.
A lot of supplements like aged garlic and turmeric can help to lower CRP, as can diet changes.
In Jan 2018 my crp was 3.39, the doctor wanted me to lower lipids or maybe I should take a stain which also works. I got my CRP down to 2.09 recently in April 2018 and will retest again this month. I am looking to get it below 1.0.