Toothed Clubmoss (Lycopodium serratum; Huperzia serrata) is an Asian plant containing Huperzine A. Huperzine A is an alkaloid having the ability to penetrate the blood-brain barrier, which is a negative catalyst for the degradation of acetylcholine, that improves nerve courseion and having a significant impact on the concentration, cognition and memory, it is a strong antidepressant. In the sports supplementation it is recommended when courseing intensive trainings and during sports competitions that require high concentration and memory. It is a component stack and pre-workout no-boosters and herbal remedies having a similar effect.