If you’re having trouble getting things moving, try increasing your soluble fiber intake. That’s because they’re a source of soluble fiber, says Dana White, RD, a sports nutritionist and trainer. In a randomized controlled trial, researchers found that increasing fiber intake significantly reduced LDL cholesterol (the bad kind), according to a 2023 study in Advances in Nutrition . Eating diverse sources of fiber helps fuel a healthier gut microbiome. Pro tip: If you’re increasing your fiber intake, you also need to increase your water intake, says Rissetto.