Following advice from Mark [Lester], I switched from TH27 to Thyroid Support Formula, and my progress from no-energy-at-all to feeling-like-a-human has been wonderful.
I have also been taking an anti-candida regime, so it is difficult to attribute the progress to one individual supplement, but taking thyroid support helped me summon enough energy to begin to address my candida. I once thought I would never feel "normal" ever again.
I am so happy to be wrong about that!