4. Headaches
A headache can have a myriad of causes but one of the most common is for it to be caused by dehydration. When the brain is dehydrated this can actually cause it to shrink due to the lost fluid – just like a sponge. This then causes the brain to pull away from the skull, resulting in discomfort and difficulty thinking.
Combine this with the lack of water needed for countless chemical reactions and you have a recipe for headache, brain fog and generally poor cognitive performance…