Peak bone mass is the maximum amount of bone a person has during their life. [1] It typically occurs in the early 20s in females and late 20s in males. [2] Peak bone mass is typically lower in females than males, and is also lower in White people and Asians compared to black populations. [1] A way to determine bone mass is to look at the size and density of the mineralized tissue in the periosteal envelope and using the bone mineral density (BMD) of a person can help determine the strength of that bone. [3] Research has shown that puberty affects bone size much more because during this time males typically undergo a longer bone maturation period than women which is why women are more prone to osteoporosis than men. [3]