Collagen in the body decreases with age and increases when the collagen decreases, elasticity and strength of the various organs of the cast structure reduced, so at the age of 25 years old-age began.
The levels of collagen in the body decreases with age and increases collagen levels decrease to give flexibility and strength of the structural members of the cast fell so at the age of 25 years, grew into adulthood.
Collagen levels in the body declines with age and when the collagen levels reduced to make the flexibility and strength of the various organs of the body structure decrease so when I was entering the age of 25 years.