The present invention relates to a method for preparing lotus root tea, which change the color of the lotus root and adds the taste and the efficacy of Rubus coreanus fruit or gardenia seeds by supplying components of the Rubus coreanus fruit or the gardenia seeds. The lotus root tea of the present invention has excellent color by showing yellow or dark purple in a radial round shape. In addition, antioxidant and antidiabetic effects are excellent because the Rubus coreanus fruit or the gardenia seeds penetrate into the lotus root.;COPYRIGHT KIPO 2017
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