While magnesium deficiency in humans is rare, medical conditions such as irritable bowel syndrome and diabetes can affect magnesium levels and cause symptoms such as irritability and muscle weakness, explains University of Maryland Medical Center. Additional symptoms of magnesium deficiency include anxiety and low blood pressure.
Individuals experiencing mild magnesium deficiency may also experience symptoms of confusion, fatigue and memory problems, according to MedlinePlus. Severe magnesium deficiency symptoms include hallucinations, muscle contractions and delirium.
The recommended daily requirements for magnesium in women is between 310 and 320 milligrams, while the recommended requirement in men is between 400 and 420 milligrams, advises MedlinePlus. Magnesium is present in a variety of fruits and vegetables such as bananas, avocados and peas.