Method for preparing yoghourt rich in gamma-aminobutyric acid (GABA)

A method for preparing yoghourt rich in gamma-aminobutyric acid (GABA) relates to a method for preparing yoghourt and comprises the steps of resuscitating, purifying and activating lactobacillus plantarum NDC75017, lactobacillus bulgaricus 11057 and streptococcus thermophilus CICC 20379, respectively enlarging culture solutions and then mixing to obtain a leavening agent, and inoculating the leavening agent to sterilized milk to ferment. The GABA content in the yoghourt rich in GABA is 151.51mg/100g. High-yield GABA bacterial strains and existing commonly-used bacterial strains are compounded and then fermented to prepare the yoghourt rich in GABA, all the bacterial strains are food-grade lactic acid bacteria, and the safety is high. In addition, products have double effects, and the yoghourt rich in GABA integrates physiological efficacy of the GABA and health-care effect of yoghourt, namely the yoghourt rich in GABA is provided with special physiological efficacy of the GABA and the health-care effect of the yoghourt and is novel health-care yoghourt.