Impairments in physical or cognitive performance under slight dehydration are explained by the body's need for fluid and water.

“So when you look out on the landscape of all these studies that have shown impairments in physical or cognitive performance under conditions of even slight dehydration, that all makes sense because our cells need fluid and we need water.”

“Again, underscored by the fact that even slight levels of dehydration can really impair our cognitive and physical performance largely by creating fatigue. But more often than not by creating brain fog.”

“We now know that even slight reductions in electrolyte concentrations or dehydration of the body can lead to deficits in cognitive and physical performance.”