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Published online by Cambridge University Press: 10 June 2020
In previous studies iron deficiency was present in preschool children in the developed world1. The objective of this randomized controlled trial was to investigate whether iron deficiency was present in pre-school children and to what extend laboratory values could be improved with a nutrient rich diet.
A diet consisting of green vegetables, beef, full-fat milk and butter was developed. This diet comes close to the traditional Dutch diet from a century ago. All food products were in age appropriate portions, according to the national guidelines. Children aged one to four years, who were referred to the paediatrician due to recurrent URTI (without immunologic disorders) were allocated to the intervention or the control group. Both groups were given standard care. The intervention group was also given the dietary advise. All parents were asked to note of daily food intake.
No iron deficiency was present in our group of 1–4 years old. Mean Hb was 7.3 mmol/l in both groups. After following the dietary advice for 6 months,the hemoglobulin (Hb) concentration increased in both groups, but a little more in the intervention group :(0,280 mmol/l; p < 0,001 in the dietary intervention group and 0,214 mmol/l in the control group; p = 0,003). MCV values increased in the interventiongroup from 77.9 to 78.8 fl (p = 0.007) whereas a smaller increase was visible in the control group ;78.5 to 78.9 fl (p = 0.18). Ferritin, a marker for iron status but also a marker for inflammation, decreased non-significantly in both groups. There was a significantly correlation with decreasing CRP levels, therefore indicating a decrease in inflammation and not merely representing iron status. Growth parameters (weight, height or BMI) did not change significantly in both groups.
NoHb deficiency was present in our research population. However, a diet consisting of green vegetables, beef, full-fat milk and butter did improve the iron status in pre-school children. Hb and MCV values increased, suggesting some evidence of subclinical iron deficiency in this group.
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