You want your FREE T4 to be in the upper half of the range and the FREE T3 to be in the upper 3rd. I wouldn't like to see a TSH of anything over 1.0 but I have an autoimmune disease (Hashimoto's.) Ferritin....yikes! Ferritin by Cardiovascular Reasearch is what I have taken to raise mine along with a lot of extra vit. C to prevent constipation. If you end up ever being positive for Hashi's (easily determined by a TPO blood test) you will likely need hormone replacement. Check your neck to see if you feel anything swollen. That's was how I got diagnosed. Good Luck!!!!!