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People who need to reason clearly and increase their ability to stay focused in periods prior to preparation for exams or oppositions.People who require great mental effort due to the rhythm of life, work and / or age.Posphoserine is the phosphorylated amino acid serine. Serine is one of the 20 amino acids in animal proteins. It is part of cell membranes and is involved in cell proliferation. In addition, it contains the amino acids L-Glutamine and L-Asparagine, which together with phosphoserine, act at the brain level. Vitamin B6 contributes to normal psychological function, normal energy metabolism, and helps reduce tiredness and fatigue.