Hi I started taking SIF#1 in March, was needing 3 per day sometimes 4. Now I'm taking 6 a day and I need to take magnesium too because 6 is not enough. When I call to order the product they say there are people who take 15 of them a day. I'm just wondering for those of you who also take it and need it daily, how many do you take? I really didn't want to have to take this many and now I'll have to increase it. I thought it was not supposed to be habit forming?