Stimulants

• Caffeine, nicotine and narcotics often have side effects that cause anxiety. These chemicals often stimulate the adrenal glands, sending users into a fight or flight state.
  
  

Preservatives

• Salt and artificial preservatives can reduce the amount of potassium in the body, potassium deficiency can have an affect on nervousness.
  
  

Magnesium

• Magnesium plays a role in muscle relaxation and magnesium deficiency can make relaxing difficult or impossible.
  
  

B Vitamins

• B vitamins help bring relaxation to stressed and fatigued bodies.
  
  

Calcium

• Calcium affects electrolyte balance, muscle contraction and hormone secretion. Too much or too little calcium can throw the entire body out of whack.
  
  

Sugar

• Sugar can cause heightened sensitivity, which can increase feelings of nervousness.