The human body is very similar to a car. Without gas cars will not work and without food the human body will not work. Using low octane gas in a luxury vehicle will likely cause mechanical issues over time, just as eating an incorrect balance of macronutrients (carbs, proteins and fats) will cause metabolic issues. Macronutrient imbalances lead to micronutrient imbalances when real food is substituted for processed foods. Think of yourself as a luxury vehicle, you deserve the best fuel for your body!