A: Plasma ghrelin levels in seven lean and eight obese Caucasian (Cauc.) individuals and in seven lean and eight obese Pima
Indian individuals matched for age, sex, and body weight. All levels are given as the mean ± SE. □, Lean individuals; ▪, obese
individuals. B: Plasma ghrelin levels in the same 30 individuals are negatively correlated with BMI. ○, Lean Caucasians; •, obese Caucasians;
□, lean Pima Indians; ▪, obese Pima Indians.