Originally Posted by KillSomething
You don't have to drink caffeine...take a pill or two. Coffee's fine too actually.
Creatine is the only supplement that comes close to caffeine in provenness/effectiveness/safeness.
Caffeine is legit and should be used and abused.
Caffeine is still a drug and it can have a large impact on mood, it's not a good substance to ingest if you want consistent energy and mood. If you were about to run a 20km race then go for it but it really isn't that helpful to everyday health or training, large doses can have a detrimental effect to performance as it's a diuretic so you lose fluids. All the caffeine in the world isn't going to help you if you're dehydrated.
The two things that you can take that by far have the biggest effect on athletic performance are carbs and water.