Hyperthyroidism: Symptoms, Causes and Support Strategies Multiple nutritional factors and thyroid disease, with particular reference to autoimmune thyroid disease Proceedings of the Nutrition Society Cambridge Core Graves' disease impacts the body by causing the immune system to attack the thyroid gland, leading to an overproduction of thyroid hormones. This excess can trigger a wide range of symptoms, including Graves' Disease: Symptoms, Causes, & Treatments SelfDecode Health