Which of the following is NOT a health problem associated with being underweight?

Being underweight can lead to a variety of health problems, primarily due to inadequate nutrient intake and the subsequent impact on body functions. Impaired immunocompetence is one health issue that can arise because insufficient body fat and nutrient deficiencies weaken the immune system, making individuals more susceptible to infections. Infertility is also a concern as being underweight can disrupt hormonal balance and menstrual cycles in women, leading to reproductive challenges. Osteoporosis is another serious complication since low body weight is associated with decreased bone density, increasing the risk of fractures and osteoporosis.

In contrast, Type 2 diabetes is typically more associated with being overweight or obese rather than underweight. This condition arises from insulin resistance linked to excessive body fat, particularly around the abdomen. While extreme cases of weight loss can lead to various metabolic issues, Type 2 diabetes does not commonly occur as a direct health problem associated with being underweight. Therefore, this makes it an appropriate choice for the answer to the question.