Where it comes from: Branched-chain amino acids are essential amino acids (specifically, valine, leucine and isoleucine). They are essential, meaning we must get them in our diet because our bodies do not produce them, explains Sarah Currie, RD and personal trainer for New York City-based Physical Equilibrium LLC.
At what age do boys stop growing? The stopping date for male growth is just as variable as the starting date. Some men are done growing around the end of high school, while others continue into the college years. Puberty generally lasts two to five years, stopping around ages 17 to 19 for boys. At the end of puberty, the growth plates on the long bones close, which ends the normal period of growth, says Dr. Gettleman.
Their growth plates usually close around ages 13 to 15, while boys' growth plates close later, at around ages 15 to 17. Before growth is complete, the growth plates are at risk for fractures (breaks). An adult whose bones have finished growing might simply pull a muscle or a tendon after a fall.