I got samples offrom Nutra and I tried one today. I ate my normal two wheat toast and downed a scoop of whey in water. I then needed to do the Vasocharge and only mixed it in about 5oz of water (says 12oz but w/e) so I wouldnt feel full during my workout (45mins out). So I downed it and it tasted good. THEN it felt like there was ACID in my stomach, it felt terrible. NEXT my face got RED like it was going to explode (Niacin flush?), it was burning. NEXT my throat started to feel contricted and close up and my breath was shallow. I was freaking out! I thought I was allergic to something in it and I was scared. It went away in about 20 mins, but it was freaky. The stomach rumbled throughout the workout, but the pumps were great. Nice pumps, but definetly not worth feeling like you are going to die.