BMI is a useful screening tool but has limitations. It does not directly measure body fat percentage and may overestimate body fat in athletes or individuals with high muscle mass, while underestimating it in older adults or those with low muscle mass. For a more accurate assessment of body fat, additional methods such as skinfold thickness measurements, bioelectrical impedance, or DEXA scans may be used.

A healthy BMI range is typically considered to be between 18.5 and 24.9. However, this can vary depending on factors such as age, gender, muscle mass, and overall health. It's important to remember that BMI is just one indicator and should be considered alongside other health markers.

If your BMI is outside the healthy range, making lifestyle changes can help. For those with a high BMI, this may include adopting a balanced diet, increasing physical activity, and managing stress. For underweight individuals, focusing on nutrient-dense foods and increasing calorie intake in a healthy way, along with strength training, may be beneficial. Always consult a healthcare provider before starting any new diet or exercise program.

The standard BMI categories do not account for age or gender in detail. However, healthcare providers may consider these factors when interpreting BMI results. For example, older adults may have more body fat at the same BMI compared to younger adults, and women tend to have a higher percentage of body fat than men. Specialized BMI charts are also available for children and teens, as their growth and development are considered.