I have some Metagenics Parex Intensive Care and Ultra Parex, which kill parasites. I forgot how long I need to take them. I had a friend who is a chiropractor and I got them from him some time ago, when he had explained to take them for some weeks and then take them again to kill the eggs. I am finishing what I have and will order more but wonder how much to get. If I was rich I would just order plenty, but I'm not so I'm trying to figure it out. I seem to remember him saying it is better to stop and then restart, to then kill the eggs, but I don't remember if he was just saving me money or if there is health reason why that is better? He is not available to me now, so any help would be appreciated. I did these products once before and did kill worms; I don't know if they are as good as some other products, but since I already have them I would like to use them(again, money). Any ideas?