Image from Amazon Before getting into how to make Gaviscon Advance or Gaviscon Double Action yourself from its component ingredients, you first need to understand how each ingredient contributes to reflux control. If you want to skip to the recipe, look below. Alginate's affects on improving reflux has been known about for decades. Initial scientific studies on how it improves reflux were conducted in the 1980s. Alginates are natural polysaccharide polymers isolated from brown…