Dear J Try "Healing with Amino Acids" by Dr Billie J. Sahley and K. M. Birkner, pain & stress centre, San Antoneo, Texas 78229 Page 20, 30, 58, 61 & 62. Tryptophan or Tryosine may help. Also try Dr. Robert Erdmann in Seattle. Best wishes, John Gooch. Glory to God should you gain hapiness via this help.