“Many people measure their glucose levels throughout the day with portable glucometers, and quite a few are likely to self-diagnose as pre-diabetics when they see something that they think is a “red flag”. Examples are a blood glucose level peaking at 165 mg/dl, or remaining above 120 mg/dl after 2 hours passed since a meal. Another example is a level of 110 mg/dl when they wake up very early to go to work, after several hours of fasting.
As you can see from the picture above, these “red flag” events do occur in young normoglycemic individuals.If seeing “red flags” helps people remove refined carbohydrates and sugars from their diet, then fine.
But it may also cause them unnecessary chronic stress, and stress can kill.”
Source: Health Correlator: Blood glucose variations in normal individuals: A chaotic mess