Related Experiment Video
Updated: May 11, 2026

The Caco-2 Cell Bioassay for Measurement of Food Iron Bioavailability
Published on: April 28, 2022
Effect of School-Based Weekly Iron and Folic Acid Supplementation Program on the Serum Folate Status of Adolescent
Amelo Bolka1, Tafese Bosha1, Samson Gebremedhin2
1School of Nutrition, Food Science and Technology, Hawassa University, Hawassa, Ethiopia.
Abstract:
BackgroundIn Ethiopia, a school-based weekly iron and folic acid supplementation (WIFAS) program is being implemented to reduce burden of anemia in adolescent girls. While the program's impact on iron levels is well-studied, there is limited evidence on its effect on folate status.ObjectiveThe study was aimed at assessing the effect of the WIFAS on serum folate levels of school adolescent girls in Sidama Region, Southern Ethiopia.MethodsA school-based cross-sectional study that compared the serum folate concentration among adolescent girls (10-19 years) enrolled in schools with (n = 165) and without (n = 165) the WIFAS program was carried out. Adolescent girls from both groups were sampled using multistage sampling procedure. The serum folate was compared between the 2 groups using mixed effects linear regression model.ResultsThe study presented significantly higher mean (±standard deviation) serum folate concentration among girls from schools implementing the WIFAS program (9.76 ± 4.02 ng/mL) than their counterparts (7.38 ± 4.53 ng/mL) (β = 2.28, P < .001). The mean hemoglobin level was also higher in the WIFAS arm (13.07 ± 1.81 g/dL) than the comparator group (12.4 ± 1.93 g/dL (β = 0.86, P = .034).ConclusionThe school-based WIFAS program showed positive association with serum folate and hemoglobin concentration in adolescent girls. This evidence should be used for advocating the scale-up of the program to areas with high prevalence of anemia and folic acid deficiencies.
Related Concept Videos
The Periodic Table and Organismal Elements
Bioavailability Study Design: Single Versus Multiple Dose Studies
Bioavailability Study Design: Healthy Subjects Versus Patients
Study Designs in Epidemiology
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.

