I have hypothyroidism and have for about 20 years. Recently, I went to the ER because I felt like I was having the mother of all anxiety attacks. Turns out I had Hyperthyroidism. They have adjusted my medication but have been doing some research and interested about this quote (and doing Atkins). Do I need to worry about sugar levels? My liver tests have been funny lately.

YOUR LIVER AND YOUR THYROID
If your liver is not overburdened with polyunsaturated fats (PUFA's) and hormones like estrogen, and the liver has ample supply of sugar, it can readily convert T4 to T3.The liver is the factory of the body, it stores sugar as glycogen for later use, organizes proteins and fats for distribution and breaks down toxins and hormones.You cannot live without sugar! It is the most important fuel for the human body, When you increase your sugar intake you speed up the conversion of T4 to T3 in the liver. If you have more T3 the body can store it in the liver, brain and muscles. This is important - once you have enough good stored sugar your life will change.

There's some research by the Broda Barnes foundation that those with thyroid disease and who are on meds need at least 30 g of carbs and 1500 calories daily for the proper conversion of T4 into T3. Do you have Hashi's-you can swing hyper to hypo with it.