HI there guys ok I have had heart palpitations on and off through my life well since early teens (im now 27) in when I had them but did not know what they were. Iím a high active guy, hyperactive allot of the time and easily a rather anxious sort of person when it comes to my health and the thought of my tinker packing in. I do allot of weight training and through the course of the last 5 years ive had some horrible moments where by ive been to the doctors thought I was going to pass out , pretty much thought I was going to die and would panic feel all numb could swear I could not feel a pulse and then it would kind of pass, but then I would be worried about the next one. They put me on an ECG and everything was fine it would never seem to happen when I wanted it to or needed it to if you know what I mean, so I accepted it and though well at least my hearts ok, I packed in all the supplements I was talking for weight training i.e. protein , creatine etc , all natural stuff, and I found it seemed to disappear. So I got to wondering I wonder if it was something that I was taking that caused this so I read up about all the stuff I was taking and if there were any recorded side effects like I was describing none. However I remembered reading a doc on Aspartame in food causing lots of problems! So I wondered if any of the supplements I was taking had that in it, I yip the protein did. So I continued to stay off it, but the I really wanted the protein so I tried it again after about 1 week the palpitations were back, so I stopped , again after 1-2 weeks they seemed to have gone again, and then I started noticing that now and aging I would get them , without the protein and then I realised it was fizzy drinks cans I was having and funny enough with the can its seemed almost straight away !, within say 2-4 hrs id get them, horrible feeling, I think I made it worse as it made you panic, but anyways ive am positive now that the only tie I get palpitations is when I eat or drink some thing with aspartame in it , I now very rarely get them as a result still have the odd can and I get few hours where my heart skips , but I know its only cause I had a can. in a way I cant believe it , I would just be very curious now to re-enforce my finding to see if all you people out there that get palpitations to start looking at what your drinking and eating ( mainly sweats have aspartame or diet supplements_) if you look at all the stuff your eating and notice thereís aspartame in it , stop taking it and see if it stops for you I feel in myself im positive this is the cause but like I said would love for other people that have the same problem to let me know if they have found this.