Final answer:
Eating disorders most commonly affect individuals during adolescence and young adulthood, with a higher prevalence in females than males.
Step-by-step explanation:
Eating disorders are mental health issues characterized by abnormal eating habits that can significantly impact health. These disorders typically begin in late childhood, adolescence, or early adulthood. The age group most impacted by eating disorders is adolescence to young adulthood, particularly among teenagers and young adults. Moreover, eating disorders are more prevalent in females compared to males. It's important to recognize that eating disorders can have serious health consequences and carry the highest mortality rate of any mental disorder.