To hydrate effectively, drink coconut water! It's packed with cramp and fatigue fighting potassium. I have found it also helps with a headache if your headache is caused by dehydration. Not only is coconut water great for hydrating you in this heat of AZ, but coconut oil is also very beneficial! Coconut oil is a saturated fat, so at first look people tend to shy away from it.
On the contrary it's a saturated fat that is used as energy in the body and mind. As a supplement you should use the extra virgin, such as Nature's Way EFA Gold. Use it in salads, brown rice, in a smoothie or anyway you like.
Studies show that the fat in coconut oil is very beneficial to the brain. Alzheimer's patients and also Parkinson's sufferers have found some great benefits from this amazing oil.
Give your brain some energy with coconut oil.
The refined coconut oil is good to replace butter in sauteing and frying food.

Please respond if you've tried coconut water or oil. thanks!
Good Eating!