I am a big fan of Nuun.  You can choose to have the added sugar in a seperate pill if you choose but the electrolytes and vitamins are great to help keep me going.  I also utilize shot blox chews when I need a boost and they usually provide a bit of a lift to my mood/energy levels within 30 min or so.  These were my goto energy supplements for a JMT in 2017 and worked great.