Candida is the most common fungus in the human body. It’s often found in areas like the mouth, skin, digestive tract, toenails, rectum and vagina (1Trusted Source). It’s generally harmless, but an overgrowth of this fungus can lead to infection (2Trusted Source). The candida diet is a strict diet meant to alleviate the symptoms of candida infections. However, its effectiveness is unsupported by scientific evidence. Here’s a beginner’s guide to the candida diet and a sample meal plan.