Sometimes people don't realize, but the unhealthy lifestyle, type of foods consumed on daily basis and other dietary habits and preferences can also affect the metabolic rate to a great extent. (foodpyramid.com)
At the end, no matter what type of food you consume, losing weight requires consuming less calories than you burn. (fitnessandpower.com)
Also, certain types of foods consumed too close to bedtime can prevent good sleep. (attachmentparenting.org)