Pediatricians in five practices in Abington, Pennsylvania conducted a cholesterol screening program (capillary bloodsample) for 4-10 year old children in their care. Children who tested positive (total cholesterol >176 mg/dl) were offered follow-up evaluations (two fasting venous blood samples) to confirm the positive initial test. Those with mean LDL cholesterol levels between the 80th and 98th percentiles for age/sex (107-164 mg/dl for boys and 112-164 mg/dl for girls) and who met other entry criteria were invited to join the study. Children with parental permission to participate were randomized to one of three groups: two that received dietary education, and a comparison group that received no dietary education. One educational program used face-to-face counseling with a registered dietitian and the other used a home-based, parent-child autotutorial approach. In addition, a random sample of non-hypercholesterolemic children with total plasma cholesterol levels between the 40th and 60th percentiles for age/sex were invited to join the study as a second comparison group. Prior to the education period (baseline) and three times thereafter (3, 6 and 12 months post-baseline), all four groups were assessed for consumption of total fat, saturated fat, and cholesterol, and their growth and pertinent cognitive psychosocial factors. Also, the plasma LDL cholesterol levels of the three hypercholesterolemic groups were assessed at all four time points along with blood indicators of iron status at baseline and twelve months.