I noticed an immediate difference when I began taking BAC. The first night, and every night for weeks after, I slept like a baby. No waking up at 3am, unable to go back to sleep. I was sleeping better than I had in many, many years. My energy level began to improve within a couple of weeks and at the end of 3 weeks I had stopped falling asleep in my chair after dinner. Within 5 weeks my digestion and elimination are better.