Being able to recognize them will help you make great decisions for yourself. Also, listen to your intuition. Your wise self never gives you the wrong answers. Your head, on the other hand, will almost always try to talk you out of it. Wake up and pay attention.
Improper nutrition causes stress in the body.
It's not hard to get the right information and make great choices for yourself. There's only so much time in this life. Every moment of it is precious. Make it all count. When you do, you'll find you have less stress, fewer physical problems, and that you're more productive.