These surgeries, even today, come with significant side effects. People have to be vigilant about getting their needed nutrients, since many aren’t as easily absorbed through food anymore. Other substances are too easily absorbed by the body, particularly drugs like alcohol. This vulnerability can then lead to alcohol abuse and may even help explain the slightly higher rates of suicide and self-harm seen in patients soon after surgery. Also distressing is that an estimated one of every 10 patients will fail to lose weight or regain the weight back in the long term, while others will require additional operations to fix complications like stomach leakages.
A major feature of the disease is a condition known as insulin resistance. Insulin is a hormone that moves glucose (sugar), from the bloodstream into the body’s cells where it is used for energy. For a variety of reasons that are not fully understood, the body’s tissues don’t respond adequately to insulin and glucose then becomes elevated in the bloodstream.
A positive result, in the absence of unequivocal high blood sugar, should be confirmed by a repeat of any of the above methods on a different day. It is preferable to measure a fasting glucose level because of the ease of measurement and the considerable time commitment of formal glucose tolerance testing, which takes two hours to complete and offers no prognostic advantage over the fasting test. According to the current definition, two fasting glucose measurements above 7.0 mmol/l (126 mg/dl) is considered diagnostic for diabetes mellitus.
Interestingly, research suggests anxiety may be tied to type 2 diabetes risk. According to a September 2016 study published in the journal Psychoneuroendocrinology, which measured levels of blood glucose and IL-6, a protein in the body that stimulates immune response and healing, found that people with with low inhibition — or attention control — were more likely to have type 2 diabetes.