Before we hit a state of blood sugar pathology (diabetes, metabolic syndrome, or latent autoimmune diabetes of adulthood for examples), we most likely spend some time, perhaps decades, in a state of functional blood sugar imbalance.
These functional imbalances probably begin due to diet and lifestyle, and the good news is that they can usually be corrected with diet, lifestyle, and natural supplementation, under the care of a trained functional medicine practitioner.