An update on my son. We discovered that vitamin C to bowel tolerance, or almost to bowel tolerance keeps my son's symptoms ( Depression from candida) under complete control, but only if he takes the vitamin C every 2 or 3 hours throughout the day. So now because of this we have been able to increase the sauerkraut gradually over the last 2 weeks and now he is eating over a cup a day and feeling good most of the time. He is also now able to eat potatoes moderately, but always with kraut; he loves kraut so that helps. I make the kraut myself.
So some other people might find that die off is more tolerable with very high doses of vitamin C, too. We also take a bunch of regular vitamins and also vitamins that help detox acetaldehyde (which candida makes) such as pantethine, NAC, and extra B vitamins.