Is 191 cm too tall for a 15 year old boy?

There is no definitive answer to this question, as it depends on a number of factors, such as the individual's genetics, overall health, and nutritional status. However, according to the Centers for Disease Control and Prevention (CDC), the average height for a 15-year-old boy in the United States is 170.5 cm, and the 95th percentile for height is 188.5 cm. This means that a 15-year-old boy who is 191 cm tall is considered to be quite tall, but not unusually so.

It is important to note that height is just one of many factors that contribute to a person's overall health and well-being. Other factors, such as diet, exercise, and sleep habits, are also important for maintaining a healthy weight and overall health. If you are concerned about your son's height, you should talk to his doctor.