The present invention relates to a method of preparing a plant product comprising at least 0.05% vitamin C on a dry-matter basis, the method comprises the steps of: (i) providing the plant material； (ii) optionally, washing the plant material with a washing liquid； (iii) freezing the plant material to a temperature below 0˚C, providing a frozen plant material； (iv) subjecting the frozen plant material to a coarsely chopping process, providing a coarsely chopped and frozen plant material； (v) subjecting the coarsely chopped and frozen plant material to an aqueous extraction solution, providing a liquid coarsely chopped and chilled plant material； (vi) wet grinding the liquid coarsely chopped and chilled plant material, providing the plant product comprising vitamin C； wherein the vitamin C present in the plant product is the vitamin C naturally occurring in the plant material.
