What I've heard is 3-4 weeks, with the worst part in the first week or so then gradually improving until you are back to "normal." Then 3-6 months to see improvement. This may also have to do with dropping to a lower dose after 3 weeks. It's okay to take a day or a dose off if symptoms are really bad -- it won't set back recovery. And there are vitamins and suppliments that can help ease symptoms. It's interesting to hear about people not having an initial reaction but having one months into treatment. Logic would say that you would either have die off at the beginning or not at all, but this is clearly not the case. I wonder if different viruses react differently or if it has to do with whether you start with a high dose or lower dose. Would be interested to hear from those who had a delayed reaction what virus(es) they had and what protocol they used. Maybe viruses just don't follow our human logic.