Why normal blood glucose level is decreases before normal the curve?

Normal blood glucose levels can decrease before reaching the baseline in a glucose tolerance test curve due to the body's insulin response. After a glucose load, insulin is released to help cells absorb glucose, which may lead to a rapid drop in blood sugar levels if insulin secretion is excessive or if there is an overcorrection. Additionally, factors such as metabolic rate, physical activity, and individual variations in glucose metabolism can also contribute to this dip. This phenomenon highlights the dynamic regulation of glucose homeostasis in the body.