Not only does this bar taste amazing...think dark chocolate, slightly salty, slightly sweet, but it also did help boost my energy in the late afternoon without affecting my sleep at night. It wasn't some crazy caffeine surge, I just felt more focused, energized and productive. Filled with only completely clean ingredients: L-Theanine, B12 and Theobromine for energy, dates for sweetness and hemp protein, these bars absolutely satisfied my need for a quick in between session snack, an afternoon energy boost and the delicious ease and convenience of a bar.