How long does caffeine take to kick in?

[greenleaf]

How long should I wait before doing cardio after taking caffeine tablet (200mg) to mobilize fat as energy for the workout? Thanks!

[TheNormalMan]

If you take it on an empy stomach, you should feel it within 10 minutes.

[phil b]

If I take caffeine alone (not often) empty stomach, 10-12 mins feeling it. 2cups water before morning cardio, Ephedrine24 mg, and aspirin 325mg ASA will work much better.

[Chyckun]

Agreed, just took a 222 mg Eternal Energy shot on a near empty stomach, looking for mainly diuretic effects for wrestling tonight. Kicking in strong at about ten minutes.
I would agree with the aspirin post, it has caffeine as well (or most do) and ephedrine is great as well, though hard to get.

[crunchnflex]

You will know when caffeine is hitting because you should feel some energy or clarity. You'll know once your kidneys are working when you have to pee from the diuretic effects.

[MCrow]

Take it just before you walk into the locker room and by the time you get out there it will likely be kicking in unless you ate something within the last hour.

[mavarick22]

Take it just before you walk into the locker room and by the time you get out there it will likely be kicking in unless you ate something within the last hour.

Lol Necro thread