Underweight

Definition

Underweight is a condition where a person weighs less than what is considered normal or healthy for their height and age.

Scientific / Technical Definition

From a scientific perspective, being underweight is defined using the Body Mass Index (BMI) as having a BMI below 18.5. It can result from various factors including insufficient caloric intake, malabsorption of nutrients, chronic diseases, or an overly active metabolism.

Benefits

Examples

Additional Information

• effects: Being underweight can lead to a weakened immune system, fragile bones, and a lack of energy. It can also increase the risk of osteoporosis and anemia.

Related Terms

• Body Mass Index
• Overweight
• Healthy Weight
• Obesity
• Nutrition

References

• BMI Classification by the World Health Organization
• Health Risks of Being Underweight