Procedures: case report. An 88-year-old diabetic patient was diagnosed with hypothyroidism after consuming 1–1.5 kg of bok choy a day and treated intravenously with levothyroxine and methylprednisolone. The patient was examined for TSH, TPO Ab and fT4 values, body temperature, blood pressure and pulse were measured. This evidence concerns the gene TPO and hypothyroidism.