Promoting vegetable intake in preschool children

This study investigated the independent and combined effects on preschool children's vegetable intake of serving a larger portion of vegetables and enhancing their flavor. In a crossover design, lunch was served in childcare centers once a week for four weeks to 67 children aged 3–5 y (26 boys, 41 girls). The meal consisted of two familiar vegetables (broccoli and corn) served with fish sticks, rice, ketchup, applesauce, and milk. Across the four meals, we varied the portion of vegetables (60 or 120 g total weight, served as equal weights of broccoli and corn) and served them either plain or enhanced (6.6% light butter and 0.5% salt by weight). All meals were consumed ad libitum and were weighed to determine intake. Doubling the portion of vegetables led to greater consumption of both broccoli and corn (both p < 0.0001) and increased meal vegetable intake by 68% (mean ± SEM 21 ± 3 g). Enhancing vegetables with butter and salt, however, did not influence their intake (p = 0.13), nor did flavor enhancement modify the effect of portion size on intake (p = 0.10). Intake of other meal components did not change when the vegetable portion was doubled (p = 0.57); thus, for the entire meal, the increase in vegetable consumption led to a 5% increase in energy intake (13 ± 5 kcal; p = 0.02). Ratings indicated that children had similar liking for the plain and enhanced versions of each vegetable (both p > 0.31). All versions of vegetables were well-liked, as indicated by ≥ 76% of the children rating them as “yummy” or “just okay”. Serving a larger portion of vegetables at a meal was an effective strategy to promote vegetable intake in children, but when well-liked vegetables were served, adding butter and salt was not necessary to increase consumption.



Work Title Promoting vegetable intake in preschool children
Subtitle Independent and combined effects of portion size and flavor enhancement
Open Access
  1. Hanim E. Diktas
  2. Liane S. Roe
  3. Kathleen L. Keller
  4. Christine E. Sanchez
  5. Barbara J. Rolls
License CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Work Type Article
  1. Appetite
Publication Date April 6, 2021
Publisher Identifier (DOI)
Deposited November 15, 2021




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Work History

Version 1

  • Created
  • Added 2021_Diktas_et_al_Promoting_vegetable_intake_in_preschool_children_.pdf
  • Added Creator Hanim E. Diktas
  • Added Creator Liane S. Roe
  • Added Creator Kathleen L. Keller
  • Added Creator Christine E. Sanchez
  • Added Creator Barbara J. Rolls
  • Published
  • Updated
  • Updated
  • Updated