Candida Complex is an opportunistic fungus (or form of yeast) that is the cause of many undesirable symptoms ranging from fatigue and weight gain, to joint pain and gas. The Candida Albicans yeast is a part of the gut flora, a group of microorganisms that live in your mouth and intestine. When the Candida Albicans population starts getting out of control it weakens the intestinal wall, penetrating through into the bloodstream and releasing its toxic byproducts throughout the body. As they spread, these toxic byproducts cause damage to your body tissues and organs, wreaking havoc on your immune system. The major waste product of yeast cell activity is acetaldehyde a poisonous toxin that promotes free radical activity in the body. Acetaldehyde is usually broken down into acetic acid within the liver. However, if this process is not working efficiently then it can circulate through your body and cause unpleasant symptoms like headaches and nausea.