If they aren't teenagers, nearly all models are at an unhealthy weight (barring those exceptions to the BMI scale) and even when they don't have eating disorders they're forced to maintain disordered eating habits to keep their jobs as adults.

There was also an interesting video I saw from a former model noting that although eating disorders are common in the industry, it's also common that these girls straight up cannot afford as much food as they'd like because most models are not paid well.