Hey guys. Im 17, 185. 5'10". Ive been lifting for about 3 years. Through that time ive used a one or two different creatines,, , and protein. I am still taking protein, but..i recently tried NoXplode for the first time in over a year and it is too much for me now. I get a huge headache and it puts stress on my chest. Nitrix feels the same way. I am kind of sensitive to caffiene, but i didn't have these problems in the past. (had great gains with nox&nitrix) So i'm being smart and staying away from these two for now. Besides a good diet, protein, and hard work, what else should i give a shot?