Not entirely. BMI doesn't distinguish between muscle and fat mass, so athletes or bodybuilders with high muscle mass may show a higher BMI despite having low body fat, meaning their result may not accurately reflect their actual health status.

The standard BMI formula is the same for adults regardless of gender, though body composition naturally shifts with age — for example, older adults may lose muscle mass, which can make BMI a less reliable indicator of health in that age group.

No. BMI is a useful starting screening tool but doesn't measure body fat percentage or fat distribution directly. It's best used alongside other indicators like waist circumference, blood pressure, and cholesterol levels for a fuller health picture.

BMI = weight (kg) ÷ height² (m²). For example, someone weighing 70 kg with a height of 1.75 m would have a BMI of 70 ÷ (1.75 × 1.75) = 22.9, which falls in the healthy weight range.

Consider small, sustainable lifestyle changes such as increasing physical activity and improving diet quality. For personalized guidance, especially if your BMI falls in the overweight or obese range, consulting a healthcare professional is recommended.