Some consensus seems to be developing for alcohol causing a moderate suppression of peripheral serum thyroxine (T4)
levels with more significant suppression of triiodothyronine (T3)
levels in chronic
alcohol users [Table 2].[17,25] In addition, alcohol-dependent individuals may present with a “euthyroid sick syndrome,” evidenced by low levels of T3, high levels of reverse T3 (rT3), and normal levels of T4.[26,27,28]
https://www.ncbi.nlm.nih.