There are two things I noticed after using BIO X4.
First, was greater regularity and this is very important to me. I was typically having a bowel movement once a day in the morning. My father used to call it his "morning constitutional." I seemingly had inherited that trait.
After a short time of taking BIO X4, this has increased to twice, sometimes, three times per day. From my early days in college taking courses for a physical education degree, I remember learning that if your digestive tract is truly healthy, you will eliminate food roughly twenty minutes after a meal as waste moves out of your body. I am not there yet, but there is an improvement.
I also noticed an increase in energy, although that may be psychological. It does not matter even if it is though when it all comes down to how I feel.
Bottom Line: Yes, I would recommend this to a friend