Reactive radicals of nitrogen (nitric oxide and derivatives such as peroxynitrite) and of oxygen (superoxide anion, hydrogen peroxide, hydroxyl radical) can inflict considerable damage on macromolecules (proteins, nucleic acids, complex lipids), give rise to carcinogens (e.g., nitrosamines), and trigger (or sometimes prevent) apoptotic death of cells such as macrophages and vascular epithelial cells. There are mechanisms for scavenging and antagonizing those highly reactive species of molecules and for repairing damage caused by them. (more…)

For people interested in reducing eye wrinkles, fine lines, and skin rejuvenation, the following story will be of great interest.

On September 20, 2005, a youthful looking Chinese woman was visiting Niagara Falls, Ontario, Canada, when she decided she would like to see the inside of a casino. The woman, Tian Yong, had never seen a casino before as they are not permitted in China. As she attempted to walk through the front entrance-way, she was stopped by (more…)

Aging theories cover the biochemical, genetic, and physiological properties of a typical organism, and the way these properties change with time. Genetic theories deal with speculations regarding the identity of aging genes, accumulation of errors in the genetic machinery, programmed senescence, and telomeres. Biochemical theories are concerned with energy metabolism, generation of free (more…)

Aging theories cover the physiological, genetic, biochemical properties of a typical organism, and the way these properties change with time. Theories of genetic dealing with the identity of aging genes, accumulation of errors in the genetic machinery, programmed senescence, and telomeres. Biochemical theories are concerned with generation of free radicals, the rate of living, energy metabolism, and the health of mitochondria. While Theory of Physiological deal most entirely with the endocrine system and the purpose of hormones in governing the rate of cellular aging. (more…)