hi proper diet always help to improvement in health. take meal on right time breakfast 8.30am lunch  1 pm dinner 8.30 pm. eat lots of fruits and salad. always have light dinner. like chapati subji most preferably green leafy vegetables. totally avoid fermanted product. spicy and fried food.

Yes there are restrictions which you need to keep in mind.

Foods to eat: - Eggs: Whole eggs are best, as much of the iodine and selenium are found in the yolk, while the whites are full of protein. - Meats: All meats, including lamb, beef, chicken, etc. - Fish: All seafood, including salmon, tuna, halibut, shrimp, etc. - Vegetables: All vegetables are fine to eat. Cruciferous vegetables are fine to eat in moderate amounts, especially when cooked. - Fruits: All other fruits including berries, bananas, oranges, tomatoes, etc. - Gluten-free grains and seeds: Rice, buckwheat, quinoa, chia seeds and flaxseed. - Dairy: All dairy products including milk, cheese, yogurt, etc. - Beverages: Water and other non-caffeinated beverages. Food to avoid - Millet: All varieties. - Highly processed foods: Hot dogs, cakes, cookies, etc. The following food can be had in moderation as it contains goiterogens: Foods that contain gluten: Bread, pasta, cereals, beer, etc. Soy foods: Tofu, tempeh, edamame beans, soy milk, etc. Cruciferous vegetables: Broccoli, kale, spinach, cabbage, etc. Certain fruits: Peaches, pears and strawberries. Beverages: Coffee, green tea and alcohol these beverages may irritate your thyroid gland