Calming Mind & Body Dietary Supplement Suitable for VegetariansTheanine Serine contains the amino acid L-theanine, to support relaxation and focused attention, and the calming neurotransmitter GABA. Taurine can support the movement of potassium out of neurons, which may help prevent overexcitation of neurons. It also features magnesium to support muscle and nerve relaxation, and calming holy basil leaf extract to gently soothe away the tension in your body. Try Theanine Serine to start relaxing today.