Define malnutrition and describe its main types.

The question asks for the definition of malnutrition and its types.

Malnutrition refers to a condition that results from nutrient deficiency or excess, or an imbalance of essential nutrients. It occurs when the body does not get the right amount of vitamins, minerals, and other nutrients it needs to maintain healthy tissues and organ function.

The main types of malnutrition are:

• Undernutrition: This includes wasting (low weight-for-height), stunting (low height-for-age), underweight (low weight-for-age), and micronutrient deficiencies (lack of essential vitamins and minerals).
• Overnutrition: This refers to overweight and obesity, which result from consuming too many calories and not enough physical activity, leading to excessive body fat accumulation.