Seasonal variations in biochemical factors related to depressive illness.
Biochemical variates that may be related to depressive illness have been shown to vary significantly according to the season. This factor must therefore be carefully considered in biochemical and therapeutic investigations into depression, and may account for the seasonal variation in depression and suicide that have been reported by many investigators.
D000639:Amitriptyline / Q000627:therapeutic use; D003866:Depressive Disorder / Q000097:blood* / Q000188:drug therapy; D005492:Folic Acid / Q000097:blood; D006801:Humans; D012621:Seasons; D012701:Serotonin / Q000096:biosynthesis; D014364:Tryptophan / Q000097:blood
D000639:Amitriptyline; D012701:Serotonin; D014364:Tryptophan; D005492:Folic Acid