I have been taking 100 Levo for about 2 years. Very rarely do I feel well. I think I noticed a marked improvement for a couple of months last summer after having 2 steroid injections for a frozen shoulder. After reading lots of posts on here and some of Isabella wentz' book I started taking supplements a few weeks ago in the hope I might feel better. I was already taking vit D, added in selenium then after a couple of weeks a folate/b12 supplement and zinc. Am now having what feels like a huge hypo crash. Really dizzy, ache in my arms and legs, tingling in my feet, stonking headache, very irritable and absolutely wiped out. At the end of my tether - again.