Fiber sounds simple enough. Eat more of it. But walk down the supplement aisle—or spend five minutes looking online—and choosing a fiber supplement gets complicated fast. There are powders, capsules, gummies, single-source fibers, multi-fiber blends, soluble fiber, insoluble fiber, and products that combine fiber with other ingredients. The front of the label doesn't always make those differences particularly clear. So instead of giving you a list of products and telling you
