We reviewed articles evaluating the relations among dieting, weight loss tr
eatment, weight cycling, eating disorders, and psychological functioning in
overweight and obese adults. Moderate caloric (energy) restriction, in com
bination with behavioral weight loss treatment, does not seem to cause clin
ically significant binge eating in overweight adults without preexisting bi
nge eating problems and might ameliorate binge eating, at least in the shor
t term, in those reporting recurrent binge eating before treatment. Most st
udies of behavioral weight loss interventions report improvements in psycho
logical status during weight loss. However, these improvements might return
to baseline with weight regain. Weight cycling does not seem to be associa
ted with clinically significant psychopathologic conditions, although resul
ts of cross-sectional studies show an association between weight cycling an
d binge eating, as well as poorer perceived health status. "Nondieting" app
roaches seem to lead to improvements in mood and self-esteem; however, weig
ht loss is generally minimal. Concerns that dieting induces eating disorder
s or other psychological dysfunction in overweight and obese adults are gen
erally not supported by empirical studies. Such concerns should not preclud
e attempts to reduce caloric intake and increase physical activity to achie
ve modest weight loss or prevent additional weight gain.