Oxygen is the most prevalent element in the earth's crust. It exists in air as a diatomic
molecule, O2. Except for a small number of anaerobic bacteria, all living organisms use O2 …

Redox degenerative reactions of the biological system inevitably produce reactive oxygen
species (ROS) and their derivatives. Oxidative stress is the result of an imbalance in pro …

Oxidative stress is the off-balance of antioxidants and free radicals. All kinds of diseases and
disorders give rise to oxidative damage including autoimmune diseases. An autoimmune …

Accumulating evidence shows that oxidative stress is involved in a wide variety of human
diseases: rheumatoid arthritis, Alzheimer's disease, Parkinson's disease, cancers, etc. Here …

The body encloses a complex antioxidant defence grid that relies on endogenous enzymatic
and nonenzymatic antioxidants. These molecules collectively act against free radicals to …

Antioxidant vitamins are organic molecules that have vital roles in the human body. They are
essential nutrients and mainly found in the food and are required in small quantities for the …

One of the most widely accepted theories proposed to explain ageing is the free radical
theory, according to which oxygen-derived free radicals cause age-related impairment …

Reactive oxygen species are implicated in the pathogenesis of certain human diseases,
including atherosclerosis, cancer, rheumatoid arthritis, drug-associated toxicity, and …

Oxidative stress (OS) has the ability to damage different molecules and cellular structures,
altering the correct function of organs and systems. OS accumulates in the body by …

Oxygen has invaded progressively, and through the ages, an initially anaerobic world.
Living organisms had to invent, in the course of evolution, diverse and ingenious defence …