Obesity is a complex medical condition characterized by excessive accumulation of body fat to an extent that it negatively impacts health. It's typically defined as having a Body Mass Index (BMI) of 30 or greater, although this measure has limitations and doesn't account for body composition.

Key aspects of obesity include:

- Imbalance between calorie intake and energy expenditure.
- Genetic and environmental factors contributing to its development.
- Association with numerous health complications.

Obesity is considered a major public health concern due to its prevalence and associated health risks. These risks include:

- Increased adipose tissue mass
- Hormonal imbalances
- Chronic low-grade inflammation
- Cardiovascular diseases
- Type 2 diabetes
- Certain cancers
- Osteoarthritis
- Sleep apnea

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