Dr. Mercola H2 Molecular Hydrogen 90 Tablets (90 Day Supply)You cant escape oxidative stress. Its something that happens naturally in your cells. And when you pile on the stressors of everyday living, such as pollution and processed foods, you can end up with high levels of oxidative stress that can damage your cells and speed up cellular aging. Hydrogen is the smallest molecule in the universe and can easily penetrate every tissue in your body, including your brain and cellular parts like your mitochondria