Enerspeed Liquid is a liquid supplement based on Guarana (caffeine), Tyrosine, Taurine and glucuronolactone, particularly indicated and appreciated in endurance sports as an excellent energizer and for contrasting fatigue. The protagonist of this supplement is Guarana, a climbing plant native to the Amazon with characteristic red or yellow fruits. The native populations of America chewed its seeds or added them to foods and drinks to increase psychophysical energy and reduce fatigue. Today it is commonly used in sports to increase mental and physical performance and to counteract the perception of fatigue, for the production of supplements and energy drinks, or as a stimulating tonic in states of severe asthenia. Its seeds, which contain from 3.2 to 7.0% of caffeine (higher than that contained in the coffee seeds themselves), theobromine and theophylline. The bioactive substances it contains are released more slowly in the body than caffeine, and its effects are more prolonged.

Tyrosine is a fundamental amino acid as a precursor of important neurotransmitters such as dopamine, adrenaline and noraderenaline, and of thyroid hormones. In the sports field of endurance sports, it is particularly appreciated as it improves cognitive abilities, focus, mood, and is particularly effective in states of severe fatigue, following competitions and during phases of intensification as a promoter of greater vigor and contrast to fatigue. Taurine is a "conditionally" essential amino acid, important for various aspects related to our body, mainly concentrated on the muscular, cardiac, nervous and hepatic levels. In the sporting context, its positive effects can influence various aspects, starting from reducing the oxidative damage induced by intense physical exercise and thus preventing potential muscle-tendon injuries and at the same time facilitating post-activity recovery.

In the field of cardiovascular "performance", it increases cardiac contractility and promotes better peripheral tissue oxygenation which is associated with its ability to counteract and remove more effectively the accumulation of lactic acid in the muscles, thus promoting better prolonged muscle performance. In this regard, I note its effect considered "energizing" in delaying the onset of central fatigue. Recent investigations to be investigated see it as capable of reducing post-activity muscle damage and the relative appearance of DOMS. The presence of Glucuronolactone, a natural metabolite of glucose known to be contained in many "energy" drinks, appears to be an excellent synergistic addition in this product, as it is used in sports or we find it present in various "energy drinks" for its psychostimulant action which would favor the state of attention and cognitive abilities during athletic performance.