I just wanted to post my experience with Angel Shanghai Chemical and dealings with "Tuk". I did purchase sema from them in December. At the time, I still had a whole vial from the previous company I had used. After the sema arrived from ASC I finished that vial then reconstituted and began the ASC vial. I wanted to give it a chance but by the end of the vial, I felt like it was nothing/garbage at best and possible a little sick or puffy. I gained weight back during using the sema from ASC. I also had some issues with swelling in my joints. I used the entire first vial because I wanted to make sure what I was feeling was due to the sema and not just being sick or something. It definitely continued until I finished it. I am on not the highest dose (.75) which has worked for me to maintain for months. I reached out to Tuk after finishing this crap vial and also seeing others post they had bad test results. She was horrible. She told me since I had purchased in December they would not be sending a replacement. I asked her why it mattered that I bought it a few months before when it was crap and harmful. I was not even asking for my money back, just a replacement that might actually be what I ordered and dosed correctly and legitimate. DO NOT ORDER FROM ASC OR DEAL WITH TUK IN ANY WAY. THEY ARE HORRIBLE TO DEAL WITH AND SCAMMERS.