Now THAT'S bad for your heart; trust me. Be careful with caffeine during a work out. Be careful with it period. I'm kinda hooked on it, so I have to be careful to apportion it out: half a no doz a day just to keep me going. Maybe 2 halfs at 2 times during the day. A redbull tastes too fucking good. Fucked around and was up to 4 of those a day and dozing off, each having the same amount as a vivarin (yellow crack). Want your heart to explode? Keep drinking that shit in the gym. I use Cytomast and sip it in the gym. Tastes like a citrus beverage, but has this syrum consistency. Gives you the carbs you need. But I'm not trying to bulk up; I'm pushing 30 years old. My metab is slowing down. I put on weight now, I'll regret it very soon. So by all means, get a 3-600 cal gainer that has some protein in it, and also get some gnc whey to sip on as well, and cop a decent shaker (blenders require too much cumbursome cleaning) and drink that too. You just saved yourself lunch. Get some L Arganine, mega men's vitamin, some vitamin c, anabolic aminoes, and eat at least 2 decent meals. You'd be set. That's what I used to do, minus the weight gainer. I kinda like bein' a little dude. I was 5'8" 132 benching 215 and leg pressing upwards of 7-800 lbs. Good fighting shape, and I looked half way decent. *shrug* That's what I need to get back to, 'cept I wanna be 150 or so. That's it. You want to add that weight with your met? Yeah, EV: 1200 cal shakes will just give you the shits all to be damned. Keep it simple at 5-600 or so cal.