Huperzine A improves muscle contraction; focus boost

Higenamine is also often added for its weight loss and mild stimulant properties. Tyrosine or its precursor N-Acetyl-L-tyrosine are commonly used to purportedly boost levels of dopamine and noradrenaline. Some brands may contain L-Dopa , but this is classified as a prescription medicine in many countries. However, despite many positive opinions about the effect of…