This is the one supplement I think everyone should have! I have taken this before a 5k, soccer matches, half marathon races! Always applicable to the job at hand! Don't leave home without it!
I go none stop for hours (10 +) doing trail maintenance. SUSTAIN X makes it feel like minutes! I couldn’t carry on at 62 if it wasn’t for Sir Matt.
I really like the Sustain X for 60-90 minute more intense activity. Actually pretty great for lifting as well. Then I use Sustain Elite for longer runs. You can't go wrong with either one.