**4. Conclusions**

Part 1: These data suggest that supplementation with walnut and walnut plus green tea provided at typical dietary levels may influence metabolism when consumed with a high-fat obesogenic Western-style diet. Specifically, supplementation with walnuts plus green tea may act synergistically to further decrease energy efficiency, improve levels of protective omega-3 polyunsaturated fatty acids, as well as decrease levels of hepatic proinflammatory fatty acids and cytokine markers of inflammation than walnuts alone.

Part 2: In obese male mice, modest level of dietary supplementation with cherry, raspberry, walnut, and green tea significantly improved circulating serum insulin concentrations and may protect against insulin resistance and heightened β-cell function. Our data suggests these foods may act synergistically to prevent the onset

*Green Tea as An Ingredient in Food Combinations Provide Metabolic Improvements DOI: http://dx.doi.org/10.5772/intechopen.107347*

of metabolic syndrome. There was also profound attenuation of weight gain and food efficiency, suggesting that these four foods may act synergistically to help with weight maintenance. Future research investigating the synergistic effect of these four foods in a human trial would help further elucidate how these metabolic benefits translate to human consumption.
