These are my test results Thyroid Panel With TSH TSH 2.950 (Reference Range: uIU/mL 0.450 - 4.500) Thyroxine (T4) 9.7 ug/dL (Reference Range: 4.5 - 12.0) T3 Uptake 33 % (Reference Range: 24 - 39) Free Thyroxine Index 3.2 (Reference Range: 1.2 - 4.9) Thyroxine (T4) Free, Direct, S T4, Free(Direct) 1.68 ng/dL (Reference Range 0.82 - 1.77) Antithyroglobulin Ab Thyroglobulin, Antibody 3.0 High IU/mL (Reference Range: 0.0 - 0.9) Please Note: Low positive Thyroglobulin antibodies are seen in a portion of the asymptomatic populations. Antithyroglobulin antibodies measured by Beckman Coulter Methodology Reverse T3, Serum 20.5 ng/dL (Reference Range: 9.2 - 24.1) Thyroid Peroxidase (TPO) Ab 13 IU/mL (Reference Range: 0 - 34) Triiodothyronine,Free,Serum 2.4 pg/mL (Reference Range: 2.0 - 4.4) I've been taking l-selenomethionine and my TPO Antibodies went down from around 500 to 13! Wow. It really works! I'm confused about the TSH. It went from almost 0 to 2.9. Not sure what is going on there. I am not doing anything different or taking a different dose of synthroid so I assume another part of my thyroid was destroyed by my immune system in some way. My question is the high amount on the antithyroglobulin antibodies. I don't even know what that is. I got the test through an online lab and it was included with the TPO antibody test. I can't really get a clear description on this type of antibody through the internet. Does anyone know if it is something to worry about? All I get is it is some autoimmune reaction to a protein in the thyroid. The "please note" message under the results seems to indicate my positive results are on the low end. I think that is what they are implying. Does anyone else here have these antibodies? Do you know what it means?