The common oil vegetable rapeseed and the rapeseed used for oil extraction are not the same plant.

1. Vegetables belong to the genus Brassica of the Brassicaceae family, and are perennial or annual herbaceous plants. Also known as brassica, cold cabbage, mustard, bitter cabbage, mustard, green cabbage. Stem cylindrical, many branches. Leaves alternate. Racemes, bright yellow flowers, long flowering period and well-developed nectaries. It bears siliques and has spherical seeds with red, yellow, black and other colors. The oil content is 35% to 50%. Originated from my country, it is dark green in color and looks like cabbage. It is a variety of Brassicaceae cabbage. It is widely cultivated in the north and south, and can be produced in all seasons. The texture is crispy and tender, with a slightly bitter taste. The signature nutrient content and therapeutic value of rape can be regarded as the best among various vegetables. According to expert determination, rapeseed contains a variety of nutrients, and the vitamin C contained in rapeseed is more than twice as high as that of Chinese cabbage. Promotes blood circulation and removes blood stasis, detoxifies and reduces swelling, widens the intestines and relieves constipation, and strengthens the body. It is mainly used to treat erysipelas, boils and swollen hands and feet, mastitis, habitual constipation, calcium deficiency in the elderly and other diseases.

2. Rapeseed is the fruit of the cruciferous crop rapeseed. It has long siliques, many pods, and plump grains. The oil content in rapeseed is 37.5-46.3. The oil content varies slightly depending on the type of rapeseed.

Rapeseed, also known as brassica, is a herbaceous cruciferous crop and one of the main oil crops and nectar crops in China. Its seeds are one of the main raw materials for making oil and fat. Cultivated throughout China, it is divided into two types: winter rapeseed and spring rapeseed. Its planting area accounts for more than 40% of China's total oil crop area, and its output accounts for more than 30% of China's total oil crop production, ranking first in the world.

Rapeseed contains a certain amount of erucic acid, which will affect the quality of rapeseed and rapeseed oil. Rapeseed also contains a certain amount of sinapine, tannin and other chemical substances, all of which have certain toxicity, so rapeseed cake needs to be detoxified before it can be used as feed.