5. Alpha-Gal Syndrome: The Allergy Explained
Alpha-gal syndrome is a unique and potentially severe allergy caused by the body’s reaction to a molecule called galactose-α-1,3-galactose (alpha-gal). This molecule is found in most red meats, including beef, pork, and lamb. After a tick bite introduces alpha-gal into the bloodstream, some people’s immune systems become hypersensitive, leading to allergic reactions—sometimes hours after eating red meat. Symptoms range from hives to life-threatening anaphylaxis.