The Link between Stress and Nutritional Insufficiency. One of the main issues with stress is that it can cause unhealthy eating habits. This applies mainly to people who are always on the go and lead a busy lifestyle. People that fall into this category often endure large amounts of stress and have no time to. fit a balanced nutrition around their busy schedule. Additionally, stress makes the body crave foods that are high in fats and sugars. This flaw in eating, in time will. inflict a greater stress on the body, plus other problems that pose a threat to your. physical and mental health.