The invention belongs to the technical field of
biology, and particularly relates to a sweet
protein composition as well as a preparation method and application thereof. The sweet
protein composition comprises the following sweet proteins: at least one of Brazilian sweet
protein,
kiwi sweet protein,
omethoate sweet protein, rhizoma curculiginis sweet protein,
capparis masaikai sweet protein, miracle fruit element, petatin,
thaumatin and
agrocybe cylindracea sweet protein. The invention also provides a preparation method of the sweet
protein composition, and the preparation method simplifies the purification process and significantly improves the purity and yield of the sweet protein. The sweet
protein composition disclosed by the invention is suitable for various foods, beverages, medicines and health-care products, so that the taste of the medicines is improved, and the compliance of patients is improved. In addition, the sweet
protein composition can also be used in weight-losing products,
antioxidant supplements and health-care products for enhancing
immunity, and oral care products such as
toothpaste and
mouth wash, and can provide pleasant
sweetness and improve mouth feel.