Perhaps many people do have psychosomatic symptoms, but it is a little sweeping to assume that everyone’s Candida symptoms are only in their head.
Candida is real; just ask the women who have chronic vaginal yeast infections. Something is going on. Medication is sold for this, so if it is in their heads, it is also in the heads of those who make/prescribe the medication.
Most people here will tell you that after they started a Candida diet the symptoms lessened or went away; regardless of whether or not doctors believe in these results, they are nonetheless results.
And whether or not you ‘believe’ in Candida, the Candida diet does work for many.