Iíve never felt the need to make a review but I was so impressed with SEMTEX that I felt I had to! I dip in and out of fitness and have never used supplements or shakes but this time Iím doing both. I bought Semtex as it was on offer at £10. I take 2 tablets on training days and nothing on non training days (it says your meant to but donít want to waste them!) Without a doubt I can do more reps and can run for longer without having to stop to catch my breath. I found that when I took it 1st thing on an empty stomach it made me quite shaky and faint feeling but when I take it in the evening its fine.