@minigreenenergy Tried a few myself 3 months ago while shooting a weekend basketball tournament. Taste ok but no noticeable effect. And FYI, only daily caffeine is one 16oz coffee in the am and no soda.
Send me a tin of the new boost and I will report back.
Long term investment with consistent use, lens.
Occassional use, small zoom. Keep in mind that the super zooms need good light for action or distant shots.