FOR the first half of Earth’s existence, there was no oxygen to be had. The air wasn’t breathable and life in the oceans was little more than primitive sludge. Even in this hostile world, though, ...

A lot of women just push through their days, not realizing they’re running on empty—low on nutrients like iron, B12, or ...

Medically reviewed by Alex Yampolsky, PharmD Magnesium can calm the brain and relax muscles, reducing anxiety ...

THE EXTINCTION of the dinosaurs some 65 million years ago is perhaps the most celebrated scientific story of modern times. Surprisingly, though, no one pays much attention to an equally intriguing ...

Magnesium (Mg) is the second-most abundant cation in cellular systems. It exerts a large variety of biological functions, ranging from structural roles by complexing negatively charged groups such as ...

Magnesium makes up 2 percent of the Earth's crust, but you won't see this silvery, light metal in nature. This versatile element occurs naturally only in combination with other elements, such as ...

More than 1.5 million Americans use an oxygen concentrator for supplemental oxygen therapy. Oxygen concentrators can be rented or bought, depending on whether you are using it for short-term therapy ...

If you have chronic obstructive pulmonary disease (COPD), your airways may be inflamed. It may be hard to take deep breaths and get enough oxygen. Depending on the severity of your COPD, oxygen ...