Make sure you are getting engough water and that you take the IF1 with you dinner. Take your weight in pounds, ie 200lbs, divide by 2, ie 100, and take that much water in ounces daily, ie 100oz.
IF3 is a great gentle way to go. Excuse the pun.
Every other day or every third day with IF1 is fine too.
www.herbsfirst.com FenLB is a gentle alternative as well.
How long have you been on the IF1. I usually like people to get on it and get 'moving'. Once they are moving 2-3x day, I have them stay at that dose for a week. Then I have them start IF2, 5x day for 5 days. Healing and cleansing = health.