What Does Alkaline Water Actually Do?

Curious about "supercharged" waters, like the ones you see everyone toting at the gym or airport?

According to Business Insider, these waters usually contain electrolytes, or have been ionized to increase its pH.

Water with higher pH, or alkaline water, can improve cardiovascular function and help people retain more fluids in the body.

That leads to more efficient rehydration than regular water.

Ionized alkaline water Essentia reported in 2018 nearly $196 million in retail sales.