Which test produces a more valid C-Peptide level, one done fasting or one done two hours after a meal? If the test is normal, is it best to proceed with insulin sensitizers or control of diet, exercise and stress?
The two-hour glucose is a much better "stress test" of insulin secretion than is the fasting glucose. If the fasting glucose is low, the C-Peptide may not be elevated to any degree normally. It is only when the glucose is elevated that you should see the C-Peptide level increased.
Original posting 7 May 2009
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Last Updated: Tuesday April 06, 2010 15:10:18
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