Myths vs facts: Insulin and blood sugar

Insulin and blood sugar are central to metabolic health, but many myths persist. A common myth: 'Insulin makes you fat.' In reality, insulin is a vital hormone that regulates blood sugar. Weight gain only occurs with a sustained calorie surplus, not from insulin alone. Another myth: 'High blood sugar only comes from sugar.' In fact, carbohydrates from bread, rice, or pasta also raise blood sugar, as do stress, poor sleep, and lack of exercise. Fact: Blood sugar is controlled by the pancreas and the cells' insulin sensitivity. In insulin resistance, cells no longer respond properly, leading to elevated blood sugar. A third myth: 'Insulin resistance is irreversible.' Studies show that weight loss, exercise, and a high-fiber diet can improve insulin sensitivity. Importantly, single gene tests (e.g., MTHFR) have no direct impact on insulin or blood sugar. The evidence for these facts is strong, based on decades of research. However, individual variability exists – medical evaluation is recommended if abnormalities arise.