Processing Methods for Cowpea Leaf Powder
Author Information
Author(s): Borbi Makafui, Weatherspoon Lorraine, Wiesinger Jason, Jackson Jose, Glahn Raymond, Bourquin Leslie, Dolan Kirk
Primary Institution: Michigan State University
Hypothesis
Different home-cooking methods affect the nutritional and physicochemical properties of cowpea leaf powder.
Conclusion
Sous-vide and steamed cowpea leaves provide a superior nutritional profile, while stir-frying negatively impacts the functional properties of the leaves.
Supporting Evidence
- Cowpea leaves contain protein up to 20 g/100 g.
- The leaves are rich in calcium, potassium, and zinc.
- Cowpea leaf powder exhibited good water/oil absorption and rehydration capacities.
- Heavy metals in the cowpea leaf powders were below the WHO permissible limits except for aluminum and high arsenic levels.
Takeaway
Cooking cowpea leaves in different ways can change how healthy they are, and some methods are better than others for keeping their nutrients.
Methodology
Cowpea leaves were processed using boiling, blanching, steaming, sous-vide cooking, and stir-frying, followed by dehydration and analysis of their nutritional and physicochemical properties.
Potential Biases
Potential contamination from cooking utensils and methods may affect heavy metal concentrations.
Limitations
The study did not explore the long-term effects of storage on the nutritional quality of the powders.
Statistical Information
Statistical Significance
p≤0.05
Digital Object Identifier (DOI)
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