Final answer:
Good nutrition leads to improved cognitive function, enhanced energy levels, and reduced stress and anxiety. It provides essential nutrients for brain efficiency and helps balance mental health, contradicting the notions of only causing weight gain or decreasing energy.
Step-by-step explanation:
Good, nutritious food does indeed have multiple positive effects on the human body, which go far beyond mere weight maintenance or gain. An adequate and balanced intake of nutrients primarily leads to improved cognitive function. This involves advancements in concentration, learning, memory, and mood modulation. Nutritious foods supply vitamins, minerals, and energy necessary for the brain to function efficiently.
Furthermore, a healthy diet is fundamental in maintaining energy levels required for daily activities. It fuels the body and, contrary to leading to decreased energy levels, it actually enhances stamina and overall well-being. Far from increasing stress levels, a balanced diet helps to decrease anxiety and tension, thus having an overall positive effect on mental health.
It is important to note that while good nutrition supports these positive outcomes, imbalances such as excessive food intake and insufficient energy expenditure can lead to obesity and associated health risks like type-2 diabetes and cardiovascular disease. Hence, understanding the role of diet and nutrition in maintaining good health and preventing diseases is crucial.