Hey guys, i got some clothes on bb.com and it cam with a free sample of Amino energy. so i took it before i went to the gym. at the gym i had a bad headache and was extremely jittery almost 4 hours later i still have a wierd headache. the serving amount was about 200mg of caffeine. how long will it be until i caffeine stops stimulating. obviously my body cant handle caffeine well and i wont be taking this again.
serious/experienced answers please.