The Myers’ Cocktail is an intravenous (IV) nutrient therapy developed in the 1970s by Dr. John Myers to deliver high doses of vitamins and minerals directly into the bloodstream. It typically contains magnesium, calcium, B vitamins (including B12), and vitamin C. This therapy is often administered for conditions like chronic fatigue, migraines, fibromyalgia, and immune system deficiencies, as it may boost energy and alleviate inflammation.