Nutrition is a major part of running and just being health in general.
There is an unlimited amount of products and foods that you can buy
to help your performance to lose more weight or heal a sickness. But
you don't need to spend a lot of money to eat healthy. Here is a great
article that list 50 healthy foods for $1 or less.
Enjoy!50 Healthy Food for Under a $1 a Pound: