Blood Sugar Dysregulation

Blood sugar dysregulation is best understood as a long, silent process rather than a threshold event. Insulin resistance — cells responding poorly to insulin — develops over years while the pancreas compensates by producing more insulin. Glucose stays normal throughout this compensation phase, which can last a decade. Only when beta-cell output can no longer keep pace does fasting glucose start to drift, and by the time it does, a substantial proportion of beta-cell function has already been lost. This explains the most common clinical misunderstanding. A normal fasting glucose is reassuring about today, not about the underlying process. Fasting insulin and HOMA-IR detect the compensation phase; HbA1c detects it later; fasting glucose later still. Reactive hypoglycaemia sits at the other end of the same spectrum. A high-glycaemic meal in an insulin-resistant person triggers an exaggerated, delayed insulin release that overshoots, producing shakiness, irritability, sweating and intense hunger two to four hours later. People experience this as low blood sugar and treat it with more sugar, reinforcing the cycle. The underlying problem is usually too much insulin, not too little glucose. The evidence on what works is unusually clear. The Diabetes Prevention Program randomised over three thousand people with prediabetes to intensive lifestyle intervention, metformin, or placebo, and lifestyle reduced progression to diabetes by 58% — outperforming metformin at 31%. Modest weight loss of 5-7% and 150 minutes of weekly activity produced that. No supplement approaches it.

• •Energy crashes two to four hours after meals
• •Intense hunger, shakiness or irritability when a meal is delayed
• •Difficulty concentrating in the mid-afternoon
• •Increased thirst and urination
• •Skin tags and darkened velvety skin in the neck folds or armpits (acanthosis nigricans)
• •Weight gain concentrated around the abdomen
• •Recurrent thrush or slow-healing cuts
• •Frequently no symptoms at all in the early years

• •Excess visceral and hepatic fat driving insulin resistance
• •Physical inactivity and low muscle mass
• •High intake of refined carbohydrates and sugar-sweetened drinks
• •Chronic sleep restriction and shift work
• •Chronic stress and sustained cortisol elevation
• •Genetic predisposition and family history
• •Polycystic ovary syndrome
• •Medications: corticosteroids, atypical antipsychotics, some HIV therapies
• •Gestational diabetes history
• •Non-alcoholic fatty liver disease

Insulin resistance begins in muscle and liver, and the trigger in most people is ectopic fat — lipid stored where it does not belong. When adipose tissue reaches its personal storage capacity, excess fat deposits in the liver and skeletal muscle, where lipid intermediates such as diacylglycerol interfere with insulin receptor signalling. This is why the personal fat threshold varies enormously: some people become insulin resistant at a BMI of 23, others remain sensitive at 32. Skeletal muscle is the largest site of glucose disposal, taking up around 80% of post-meal glucose. Low muscle mass and inactivity therefore reduce the body's capacity to clear glucose regardless of diet, which is why resistance training improves insulin sensitivity independently of weight loss. Sleep deserves particular attention because it is so often overlooked. Restricting healthy young men to four hours of sleep for six nights produced insulin sensitivity in the range seen in older adults with diabetes — a dramatic and rapid effect that reversed with recovery sleep. Shift work carries a comparable, chronic version of the same problem. The liver contributes independently. In insulin resistance, hepatic gluconeogenesis is no longer suppressed properly overnight, which is why fasting glucose rises first in many people and why fatty liver so often accompanies the picture.