I do well with Gatorade, Nuun, and Elixir (love the orange!), and water, but I recently got a tube of Hammer FIZZ (lemon lime) and tried it at home...GADS! Serious gastric distress! Too much magnesium in it perhaps, as it sure FELT insiode, like I had drunk a bunch of Milk of Magnesia! Blech! Plus it has that nasty magnesium aftertaste. No more FIZZ for me!