The first involves true polycythaemia, where your body produces more red blood cells than necessary, often in response to chronic low oxygen levels, certain medical conditions, or rarely, bone marrow disorders
2006;136(3 Suppl):716S-725S
Maintaining an optimal level of glutathione appears to be important for supporting cognitive function, especially during aging.* The normal process of aging is associated with a decrease in glutathione activity, which can result in increased oxidative activity.* Less than an optimum level of glutathione is observed in individuals experiencing a decline in cognitive function.* Conversely, individuals who live to 100 tend to have higher glutathione activity.*
Don't use on or irritated skin, and always patch test first
A separate 12-week eye cream study in 41 women showed GHK-Cu outperforming both placebo and vitamin K cream for reducing lines and wrinkles around the eyes while increasing skin density