Dr. John Callahan DO

Recommended Articles

• L-Lysine Benefits and Uses

  What is L-lysine?L-lysine is an essential amino acid, which is mostly found in proteins of food items such as milk, yogurt, beans, wheat germ, cheese, and other animal proteins. Several amino acids are known as the building blocks of proteins. These building blocks are essential for the several...

• Are You Dehydrated?

  Everyone knows that your body needs water to function properly, yet many of us are dehydrated. What most people don’t realize is how much water they actually need. Being dehydrated is your body’s reaction to not drinking enough water, resulting in a fluid deficiency. Researchers estimate that...

• What Causes Lupus?

  Lupus is an autoimmune ailment. This means that instead of your body’s regular defense system attacking viruses and bacteria, it destroys healthy tissues. This causes swelling. Symptoms include extreme fatigue, hair loss, rashes, cognitive dysfunction, severe muscle and joint pain, ulcers in the...

• Do I Have the Flu?

  The flu is a contagious viral infection that commonly occurs during the fall through spring. Understanding the symptoms of the flu will help in getting medical attention at an early stage, so that an individual can be cured within a shorter period of time. Understanding that you have the flu and...

• Different Blood Types and What They Mean

  The ABO (A, B, AB, or O) blood group system is used to classify different types of antibodies in the plasma and antigens in the red blood cells (RBCs). The ABO blood group and RhD antigen determine the type of blood that is a perfect match for blood transfusions. The four ABO blood groups are: ...

• What Specialists Treat Laryngitis?

  Laryngitis is a condition that occurs when the voice box - also called the larynx - is inflamed and becomes swollen. It therefore cannot vibrate. It thus produces a hoarse sound from the throat or in some cases, rids one of their voice entirely. Recovery without treatment is possible.Symptoms of...