Caffeine - I'm sure you have heard of "caffeine" most of us drink:Coffee
Theses are only three examples of where caffeine can be found look it up and you will find more :)
Caffeine is available in many products and has been sold as tablets/capsules. It has been used to boost energy levels it has been know to be useful in strength/short and long training session.
Although drinking cup after cup will only create a resilience to the benefits that are available. The best method is to keep the body guessing. By this I mean try to avoid caffeine for up to for days + the longer the better as this will produce a better effect. A note is too keep well hydrated to compensate for any extra fluid loss.
|Regardless of what suppliments you choose you should always aim to eat a diet that is balanced|