Summary
This study evaluated how agronomic biofortification strategies using organic residual products and microorganisms affect micronutrient bioaccessibility in locally consumed complementary foods in Senegal. Poultry litter alone or combined with microorganisms significantly improved iron bioaccessibility in cowpea (27–29% versus 9% in non-biofortified controls), whilst combined agronomic strategies substantially enhanced β-carotene bioaccessibility in orange-fleshed sweet potato. Portions of biofortified porridge could theoretically meet 100% of daily vitamin A requirements for infants, suggesting that strategic crop combinations with tailored agronomic inputs may help address micronutrient deficiencies in populations reliant on monotonous diets.
Regional applicability
Direct applicability to UK systems is limited, as the study addresses complementary feeding and micronutrient gaps characteristic of low-income settings with cereal-legume-based diets. However, the methodology for assessing micronutrient bioaccessibility and the evidence for organic amendment effects on nutrient availability may inform UK research into crop biofortification and food-based approaches to nutritional adequacy.
Key measures
Iron, zinc, and β-carotene bioaccessibility (%) measured via static in vitro digestion protocol; micronutrient content; coverage of daily requirements for children aged 6–23 months
Outcomes reported
The study assessed iron, zinc, and β-carotene bioaccessibility in complementary foods (millet, cowpea, orange-fleshed sweet potato) produced using agronomic biofortification strategies with organic residual products and microorganisms, evaluated through static in vitro digestion.
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