Everyone is different, but for me this is the perfect combination. I do not like to feel jittery or speedy. One pill before I go on a run and I have WAY more energy. I can run 7 miles instead of 2 or 3. Two more pills when I get back after a snack and I'm good to go until dinner. Don't want to eat dinner?? Take another one. This bottle was sent to me by mistake and it is my new best friend! It absolutely curbs my appetite to nothing and gives me the energy I need in a hectic life.