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Nutritional profile of restructured beef steak with added walnuts
A Serrano1, S Cofrades, C Ruiz-Capillas
1Instituto del Frio (CSIC), Ciudad Universitaria, 28040 Madrid, Spain.
Meat Science
|November 9, 2011
Summary
Adding 20% walnuts to restructured beef steak improved its nutritional profile. This beef product had healthier fats, reduced cholesterol, increased vitamin E (gamma-tocopherol), and higher mineral content, suggesting potential health benefits.
Area of Science:
- Food Science
- Nutritional Biochemistry
- Meat Science
Background:
- Restructured meat products offer a versatile way to utilize meat components.
- Incorporating functional ingredients like nuts can enhance the nutritional value of processed foods.
- Understanding the impact of ingredient substitution on the final product's composition is crucial for product development.
Purpose of the Study:
- To evaluate the nutritional composition of restructured beef steak with added walnuts.
- To compare the effects of incorporating 20% walnut on fatty acid profile, cholesterol, vitamin E, and mineral content against a control beef steak.
- To identify potential health benefits associated with walnut inclusion in restructured beef.
Main Methods:
- Analysis of amino acid profile, fatty acid profile, cholesterol, vitamin E (gamma-tocopherol), and mineral content (iron, calcium, magnesium, manganese).
- Comparison between restructured beef steak with 20% added walnut (20W) and control restructured beef steak (0% added walnut).
- Statistical analysis to determine significant differences (P<0.05).
Main Results:
- The 20% walnut (20W) product showed a lower lysine/arginine ratio.
- Increased levels of monounsaturated (MUFA) and n3 polyunsaturated fatty acids (PUFA), primarily alpha-linolenic acid, were observed in the 20W sample.
- The 20W product exhibited a lower n6/n3 PUFA ratio, a higher polyunsaturated/saturated fatty acid ratio, reduced cholesterol, and a significant increase in gamma-tocopherol.
- Elevated iron, calcium, magnesium, and manganese content in the 20W sample compared to the control.
Conclusions:
- Incorporating 20% walnut into restructured beef steak significantly alters its nutritional profile.
- The changes include improved fatty acid composition, reduced cholesterol, enhanced vitamin E, and increased mineral content.
- These nutritional modifications suggest potential health benefits for consumers of walnut-enriched restructured beef steak.
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