Candida is a type of yeast or fungus. This is found throughout the world and resides on our skin as well. Many people also have it in there bladder or in there gastro-intestinal system. This can cause infection -- but often is just normal. Overall, while there can be problems caused by candidiasis -- this rarely is a cause.
There are real infections cause by candida. For example, candida in the blood is a severe and life-threatening situation that requires treatment urgently.
However, most conditions are simply "colonization" which is not an infection but just the presence of the yeast. Often the yeast is just there -- not causing any problem. There are many people who try and treat these colonizations -- but they don't work. Numerous studies have shown that cleaning out the yeast doesn't make a difference.
Because there is a difference between infection and colonization -- it is difficult to say all the conditions are 'fake' -- but you are right in that some alternative practitioners try to treat this without data to support it.
Candida is not at all related to emotional or cognitive problems.
IBS not due to candida. Treating it does not help.
Please talk to your doctor
for more information!