Although we talk about hormones in much detail in Chapter 3, here we just want to say that critical hormones such as DHEA, pregnenolone, testosterone, and others begin to decline around age 35. Perhaps the most important thing that happens when hormone levels begin to decline is that the body tries to correct the problem by increasing production of cholesterol. To help prevent or correct this response and others launched by the body when hormone levels fall, the main goal of our Restorative Medicine Program is to bring a person’s hormone levels back to what is optimal for each individual at age 25 to 30.