All diets fundamentally aim to restrict food intake, timing, or macronutrients, yet weight loss remains a challenge, especially for those with hypothyroidism. Low-carb and ketogenic diets may hinder thyroid hormone conversion, complicating weight management. Additionally, the potential link between gluten and autoimmune responses in hypothyroidism raises questions about dietary choices, with mixed evidence on the benefits of gluten-free diets for thyroid health.