Purple sweet potato (scientific name: sweet potato) is also called black potato, and its meat is purple to deep purple. It is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, as well as selenium and anthocyanins. Purple sweet potato is rich in nutrition and has special health care function, in which protein amino acids are easily digested and absorbed by human body. It is rich in vitamin A, which can improve vision and mucosal epithelial cells of the skin. Vitamin C can make collagen synthesize normally and prevent scurvy. Anthocyanin is a natural powerful free radical scavenger.

Yam, that is, yam, also known as yam, yam, sweet potato, sweet potato and jade swallow. Perennial herb with creeping stems, usually purplish, cylindrical roots, opposite leaves, oval or oval flowers, and dioecious. Root tuber contains starch and protein, which is edible. There are 650 species of monocotyledons 10 genus, which are widely distributed in temperate and tropical regions of the world. There are about 80 species of Dioscorea in China. Originally from Pingyao and Jiexiu, Shanxi, it is now distributed in North China, Northwest China and Jiangxi provinces in the Yangtze River basin.

Eucommia ulmoides Oliv Eucommia ulmoides Oliv. is a precious nourishing medicinal material in China. Sweet in taste and warm in nature. Liver, kidney and stomach meridians entered. Efficacy: tonify liver and kidney, strengthen tendons and bones, regulate chong and ren, consolidate menstruation and prevent miscarriage. Treat lumbago and leg pain or soreness and weakness caused by kidney-yang deficiency. Diseases such as fetal instability and scrotal itching caused by liver-qi deficiency. Shennong materia medica is listed as the top grade.

Eucommia ulmoides Oliv It contains a very small amount of free amino acids and a small amount of protein, which is a complete protein similar to most foods, that is, it can hydrolyze and detect 8 amino acids necessary for human body. 15 mineral elements in Eucommia ulmoides Oliv. Include trace elements such as zinc, copper and iron and macro elements such as calcium, phosphorus, potassium and magnesium.

Modern research on Eucommia ulmoides Oliv. It has pharmacological effects of removing body garbage, enhancing metabolism of human cellular substances, preventing musculoskeletal aging, balancing human blood pressure, decomposing cholesterol, reducing body fat, restoring vascular elasticity, diuresis and clearing heat, broad-spectrum antibacterial, exciting central nervous system and increasing white blood cells.