3. Is it really necessary to follow the dietary restrictions and lie down before testing?
There is some disagreement over the specifics of how the sample should be collected. However, the level of catecholamines (and their metabolites) in blood is affected by diet and stress levels. For test accuracy, interfering substances need to be avoided and the person's physical and emotional stress levels should be minimized.
This article was last reviewed on February 23, 2012. | This article was last modified on February 26, 2013.
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