Known from the recipe of Silm FX, 1,3,7,8-tetramethylxanthine is one of the components. The product claims it is useful for men and women who are striving to lose weight, but frequently fall short due to tiredness and unhealthy snack cravings throughout the day. The central to successful weight loss plan is the ability to suppress your appetite, especially cravings for unhealthy carbs like sugar. Slim FX works by curbing, not eliminating appetite, so people can remain healthy by eating a small balanced diet and controlling intra-meal cravings. Take Slim FX and eat three sensible meals a day and curb the cravings for unhealthy snack foods between meals. But some data from the US Army Aberdeen Proving Grounds, the action of STIM X as well as Venom stem from an 8-substituted methylxanthine. People have mentioned the habitual use of both will really dry you out and make you cramp. Also, a rapid water loss could be mistaken for fat loss by many people. So some people think caffeine and paraxanthine are actually better fat loss agents than the 8-subbed versions.