Leaky Gut Syndrome is just what it sounds like: when there are holes in your digestive tract - whatever is in there can leak directly into the bloodstream and elsewhere in the body.
Leaky gut, also known as increased intestinal permeability, has been linked to obesity, skin problems, food sensitivities, depression, autism, and heart disease.
In its yeast state Candida is a non-invasive organism, however in its fungal state it is invasive and can produce very long root-like structures called rhizoids. These roots can penetrate your intestinal walls, leaving microscopic holes. Undigested food particles (among other things) can enter the bloodstream through these holes causing Leaky Gut.
You can read more about how Candida takes over on the Candida description page.
Since Leaky Gut can be directly caused by Candida, you should start on one of the treatment programs. The natural cure uses herbs and supplements to get the Candida under control. The medicine page describes how to use pharmaceuticals to kill the Candida. I always recommend the natural Candida cure since pharmaceutical anti-fungals are hard on your liver.
You also need to keep a journal of everything you eat and how you feel two hours later. This journal is critical in determining what foods you should avoid and what foods you can eat.
Any food that makes you feel ill, tired or bloated should be removed
from your diet until the treatment program is complete. Also any food
that creates cravings instead of filling you up should be avoided.
When the treatment program is complete, don't immediately jump back into your old eating habits. Do the challenge phase of the Candida diet.
Using a treatment program and keeping a journal your eating habits will help you get the Candida overgrowth under control. Since most cases of Leaky Gut are caused by excess Candida, you will also get your Leaky Gut fixed.