This product stimulates the immune system in such a way as to increase lymphocytes (aka the "fighter cells"). As such this product has been largely effective for cancer patients. Here is a quote from their website:
"...Biobran is the most powerful immunomodulator he has ever tested. Although nobody yet knows the exact mechanism, it appears to be able to do this by increasing the body's production of natural cytokynes — substances such as interferons, interleukins and tumour necrosis factors, which not only help destroy rogue cells and viruses directly, but kick-start the immune system by increase the activity of the lymphocytes — B cells, T cells and especially NK (natural killer) cells. B cells focus on producing antibodies whilst the T and NK cells wander through the body directly destroying virally or bacterially infected cells, and cells that have turned cancerous. (In its lifetime, a single NK cell can kill as many as 27 cancer cells, sticking to them and then injecting lethal chemical granules that can destroy the abnormal cell in less than 5 minutes.)"
So although the product is INDEED an immunomodulator, its effectiveness seems only documented in cancer patients. It is difficult then, to arrive at the conclusion that because this product did not allegedly help you, that candida overgrowth cannot be connected to a foundational problem with the immune system. Many tests would need to be performed and certain questions would need to be answered before one could reach such a position based on one experience.
For one thing, we would obviously need to see this product tested on a panel of persons suffering from candida overgrowth. As we have seen many times, different protocols are effective for people in different ways. In no way does this dismiss the growing evidence connecting our symptoms to an overall problem with the immune system.