Worthless supplement in my experience.
I read a Poliquin article on here about workout nutrition and he recommended taking in 3,000 mg of ALCAR upon rising to get energized for a morning workout. I was doing that for a month straight and saw no difference in my mental or emotional or any physiological state.
The problem with reading such info is that we focus on a single mechanism of a concerted process (e.g. fat metabolism) and think that, by providing exogenous amounts of a single chemical that is a part of the process, we can somehow accelerate or improve upon the process. Often times, that just isn’t how the body works, and there is also a limited rate at which the body can perform the process anyway.
Save your money.