Multiple vs Single Target Vegetable Exposure to Increase Young Children's Vegetable Intake

ObjectiveTo evaluate the effectiveness of repeated exposure to multiple vs single target vegetables in increasing young children's vegetable intake.MethodsA pilot randomized controlled trial (children aged 4–6 years, n = 32) was conducted, which exposed children at home 15 times over 5 weeks to either 1 (single target) or 3 (multiple target) vegetables. A comparison group did not change eating habits. Vegetable intake was measured by (1) a dinner meal consumed at research facilities, (2) 3-day weighed food records, and (3) usual vegetable intake (parent report). Measures were collected at baseline and either immediately after intervention (1), at 3-month follow-up (3) or both (2).ResultsThere were no differences between groups at baseline in vegetable intake. Usual vegetable intake increased in the multiple target group from .6 to 1.2 servings/d and did not change in other groups (P = .02). Food record data were not significant but underpowered. Vegetable intake from dinner meals was not significantly different between groups.Conclusions and ImplicationsExposure to multiple vegetables simultaneously may be more effective than a single vegetable to increase young children's intake. Larger scale research is recommended to confirm the effectiveness of offering variety in exposure and to enhance the understanding of the mechanisms involved.