Even though I have some of the symptoms of low thyroid function, such as fatigue, insomia, depression, etc. and my TSH was 3.92 with FT4 of 16.8 suggesting possibly an underactive thyroid, I've always been hungry, but don't seem to put on much weight for the amount I eat. I've had periods in the past when when i've experienced weight loss in stressful periods. I think my body isn't a good storer of nutrients and that's why i'm always hungry. However, one of the typical symptoms of an underactive thyroid is weight gain which I definately don't have.
Another thing, the recent blood test I had showed I had high total Cholesterol 5.4 and LDL Cholesterol 3.4. This was alarming because i'm young, health conscious, exercise regularly, etc. I've heard that high cholesterol levels and thyroid problems can be related. Any insight?