Stable blood sugar supports steady energy. When levels spike and crash, you may feel tired, hungry sooner, or get cravings.
It also matters for metabolism. Over time, repeated high blood sugar can contribute to insulin resistance, making it harder for insulin to work.
Blood sugar changes can affect digestion too. High glucose can shift gut conditions, which may influence inflammation and the balance of gut microbes. Long-term, consistently high blood sugar increases the risk of prediabetes, type 2 diabetes, and related heart health problems.