Oxidative stress is caused by an imbalance between the production of reactive oxygen species and a biological system's ability to readily detoxify the reactive intermediates or easily repair the resulting damage.
In humans, oxidative stress is involved in many diseases, such as Parkinson's disease, heart failure, Alzheimer's disease, fragile X syndrome and more, but short-term oxidative stress may also be important in prevention of aging.
OXIS International is a company that is involved in researching this oxidative stress and of course, they came up with solutions and products which can counteract the harmful effects of “oxidative stress”.

OXIS International focused their researches on anti-aging and antioxidant through naturally occurring protective substances since they are more likely to be both safe and efficacious. The company is the premiere provider for the potent antioxidant, Ergothioneine and through their patented synthetic manufacturing process remains the only significant commercial source of pure l-ergothioneine worldwide.