The Impact of Consuming Zinc-Biofortified Wheat Flour on Haematological Indices of Zinc and Iron Status in Adolescent Girls in Rural Pakistan: A Cluster-Randomised, Double-Blind, Controlled Effectiveness Trial
Swarnim Gupta, Mukhtiar Zaman, Sadia Fatima, Babar Shahzad, Anna K. M. Brazier, Victoria Hall Morán, Martin R. Broadley, Munir Hussain Zia, Elizabeth H. Bailey, Lolita Wilson, Iqbal M. Khan, JONATHAN KENNETH SINCLAIR, Nicola M. Lowe · Nutrients (2022)
TL;DR
Eating zinc-biofortified wheat flour raised daily zinc intake in adolescent girls, but it did not raise their blood zinc levels.
What they did
Researchers studied 517 adolescent girls aged 10 to 16 years in rural Pakistan. Households received either zinc-biofortified wheat flour or regular control flour for 25 weeks. The team collected blood samples and diet records to test mineral levels.
What they found
Girls eating the biofortified flour increased their zinc intake by 1.5 mg/day, or 21%, and their iron intake by 1.2 mg/day. Blood zinc levels did not change significantly, showing 643.8 ± 106.2 µg/L in the intervention group versus 641.6 ± 95.3 µg/L in the control group. However, the rate of low stored iron fell from 11.8% in the control group to 1.0% in the intervention group.
Why it matters
Studies suggest that choosing staple foods bred with extra minerals may help boost daily nutrition. Getting more minerals from staple foods is linked to better overall mineral intake in grain-reliant diets. These findings show that fortified crops may support healthy nutrition through everyday meals.
Limits
The abstract notes that blood zinc levels did not rise and that finding a more sensitive measure of zinc status remains an ongoing priority. This is general education, not medical advice.
Jargon explained
- Biofortification
- Breeding food crops to naturally contain higher amounts of essential nutrients.
- Serum ferritin
- A blood protein that shows how much iron is stored in the body.
Read the original: https://doi.org/10.3390/nu14081657
Full citation
Swarnim Gupta, Mukhtiar Zaman, Sadia Fatima, Babar Shahzad, Anna K. M. Brazier, Victoria Hall Morán, Martin R. Broadley, Munir Hussain Zia, Elizabeth H. Bailey, Lolita Wilson, Iqbal M. Khan, JONATHAN KENNETH SINCLAIR, Nicola M. Lowe (2022). The Impact of Consuming Zinc-Biofortified Wheat Flour on Haematological Indices of Zinc and Iron Status in Adolescent Girls in Rural Pakistan: A Cluster-Randomised, Double-Blind, Controlled Effectiveness Trial. Nutrients. DOI: 10.3390/nu14081657
Open access (gold): https://doi.org/10.3390/nu14081657
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Educational information only, not medical or dietary advice. Consult a qualified health professional for personal nutrition guidance.