Hi,
Cabbage, brussels sprouts, broccoli, cabbage and cauliflower can block thyroid if these otherwise highly nutritious foods are eaten in very high doses. So you should eat those food in small or moderate amount.
Effective hypothyroid diets should seek a broad range of natural foods including whole grains, seafoods, nuts, and seeds. Include a broad based multi-vitamin.
Selenium (essential for converting T4 thyroid hormone into it’s active form, T3)
Vitamin D and Zinc may be important.
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Regards,
Dr.Yetimyan