There are many theories of aging (hormonal, wear-and-tear, etc.), but only the overmineralization theory (video) explains why humans age at three different speeds:
- no biological aging during childhood years, characterized by using calcium, iron and copper in making new bones, red blood-cells and collagen;
- accumulation of minerals once childhood growth ceases and progressive aging as evidenced by buildup of lipofuscin;
- slight decline in the rate of aging in late life, which has been correlated with reaching a steady state of minerals.
Harvard research postulates that “root cause of aging” are sirtuins.