張鵬尭 5 I been looking for a good B complex vitamin in Japan. I been trying lots of drugstore and popular brand of supplements but no really satisfied with them.So i found this cause soon summer comes and is worst how i feel in japanese summer. This B complex also have Electrolytes that makes a big diffence! Helps lot to maintain hydration and the B complex is so good % and balance. Is that i need! 3 days drinking and feel the diffence about energy and good sleep.