Referring to this one ?
IOW, yes, thanks! But really: How did you do that?
Time of day is just one factor that could potentially be relevant, but my point is that in general, most things we measure in the blood are kept at a certain level, but there can be wide variations in these measurements in a single person over time. At one extreme, blood glucose is tightly controlled within narrow limits, at the other extreme, women's hormones fluctuate greatly over the month. Most things we measure in the blood are somewhere in between, with "normal" values being given within a certain range, and fluctuations within that range aren't considered real changes. Fluctuations could be influenced by time of day, food and drink, stress, temperature, season, as well as conditions during the blood withdrawal and lab testing. So when a value increases numerically, it doesn't necessarily reflect a biologically-significant increase.