An innovative dietary approach to obesity, based on the set-point theory of body weight and associative learning, was developed by Seth Roberts. Roberts's approach focuses on dissociating flavor and calories by consuming small amounts of very bland but calorie-dense foods such as extra-light olive oil between meals. Roberts believes that the dissociation between flavor and calories lowers the body weight's set point, suppressing appetite and thereby inducing weight loss without causing hunger. Studying the feasibility of this approach is particularly relevant to patients taking drugs that cause increased appetite and weight gain as a side effect, as increased hunger makes the usual calorie restriction approach even more difficult than it normally is. Low-income people have a diet higher in prepackaged standardized foods, which may be one contributing factor to their higher risk of developing obesity.