Actively dieting

Eating Attitudes Test (EAT) \> 30

Chronic uncontrolled health problems (not including obesity or diabetes)

Pacemaker or other internal electronic medical device

Schizophrenia, history of bipolar disorder, current Major Depressive Disorder

Dependence on alcohol or sedative-hypnotic drugs (e.g. benzodiazepines)

Cognitive impairment severe enough to preclude informed consent

Taking weight loss or appetite-suppressant medications

Taking appetite affecting medications (e.g. SSRIs, steroids, Ritalin)

Food allergies to wheat, gluten, soy, or nuts

Pregnant or lactating

Comparison of Medifast's 5 & 1 Plan to a Food-based Plan of Equal Calories