Blood sugar imbalances can significantly impact thyroid hormones, particularly for those with Hashimoto's. Eating high-carb foods can exacerbate autoimmune attacks, leading to increased anxiety and mood swings. By balancing blood sugar through higher protein and fat intake, individuals often experience reduced thyroid antibodies and improved overall well-being. It's crucial to focus on nutrient quality rather than simply lowering carbohydrates to avoid energy dips and anxiety.