Throughout the rest of stuff (Bata alanine, tyrosine, Giseng) is dosed vieel too low to have any effect (which is also scientifically controversial) to have. However, just caffeine and guarana is as effective. The price fits really well. If 2 capsules one really has a good amount of caffeine. Guarana seems a bit long-lasting than the normal caffeine. It must be said that in all boosters caffeine the main ingredient is. Caffeine can actually lead to more strength and stamina. Downside is that it can be a starting 2 capsules dim. I can not tolerate caffeine not particularly good. Whoever wants to just have caffeine capsules actually quite well served in the blister is.