H4U Memory 30H4U capsules. Interesting dietary supplement for anyone over 50 or any age if they suffer from minor memory loss. Phosphatidylserine and choline increase the impermeability of neurons and improve nerve impulse transmission, but their concentration decreases with age. This supplement helps to significantly improve memory. Taurine is an amino acid that serves as a neurotransmitter (a chemical messenger for the nervous system), a regulator of salt and water balance within cells, and a stabilizer of cell membranes.