Define 'malnutrition'.

Malnutrition is a broad term that encompasses various forms of nutrient imbalance in the diet. It refers to a condition that arises from an inadequate, unbalanced, or excessive intake of nutrients, which can lead to both undernutrition and overnutrition. The correct answer highlights that malnutrition results from an imbalanced nutrient intake, which includes deficiencies, excesses, or imbalances in energy, protein, vitamins, and minerals.

This condition is not limited to just a lack of nutrients, such as protein deficiency, but can also relate to consuming too much of certain nutrients or having an overall unhealthy diet. It may express itself through multiple forms, such as stunting, wasting, obesity, and various micronutrient deficiencies. Understanding malnutrition in this way acknowledges its complexity and the need for a balanced diet for optimal health.