A healthy body fat percentage range for adults generally falls between 10%-20% for men and 18%-28% for women. This range can vary based on individual factors such as age, fitness level, and genetics. Maintaining body fat within these parameters is crucial for overall health, as excessive body fat increases the risk of obesity-related diseases. Too little body fat can also be detrimental, leading to hormonal imbalances and inadequate energy availability, emphasizing the importance of balance.