I don't have any personal experience with sub,but if you go to the health pages,top right,you will find that some of the members here have shared their experiences with it.Weekends are a little slow here,but there are many more who will come along that can help you more then me.Good luck to you and your friend.Keep posting....Kim
Welcome to the forum.
Check out the thomas recipe, scroll all the way down, bottom right.
Please keep us informed. As Kim said it's a little quiet in the w-e.
Help is on the way, hang in there.
PS I think it's wonderful what you're doing for your friend. You have my deepest admiration.