t3

hello there so nice to be back here! I hasimoto very high antybodys taking  125 tyroxine i  increased dosage from 100 mcg myself , feels good but still fighting extra 6 kg , wont to add some t3 for speeding my metabolism and wont to buy   Absolute Nutrition Thyroid T-3 Radical Metabolic Booster, Does anyone know anythig about stuff like this , but please do not tell me to ask my Docotor I live in a 3 rd wold coutry and docotors do not know much about endocrinology  
thanks amd sorry for my mistakes englis is my 3rd language and alphabet.