Happiness is: iron.
Addy
D P
DP
D000747:Anemia, Hypochromic / Q000503:physiopathology; D001921:Brain / Q000503:physiopathology; D002648:Child; D002653:Child Behavior Disorders / Q000209:etiology; D002675:Child, Preschool; D005260:Female; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D007223:Infant; D000090463:Iron Deficiencies; D008297:Male; D008606:Mental Processes / Q000187:drug effects
D006454:Hemoglobins