The authors studied the effect of a catecholamine-controlled diet on the
urinary level of 3-methoxy-4-hydroxyphenylglycol (MHPG) of 6 depressed
patients and 6 normal volunteers. The normal subjects showed no change in
MHPG levels on or off the diet; the depressed patients showed a significant
increase in MHPG while off the diet.Abstract Teaser