It is one of the purest forms of acetylene-l carnitine I take this daily first thing in the morning before the gym and even on my rest days. It taste sour but you can mix it with anything. It makes you sweat more while at the gym, and has helped keep my cravings down throughout the day. I have used this for two months and have definitely notice my appetite is suppressed and have noticed more definition in my upper body. Definitely recommend! Thank you to ATP science and aminoz.