ONIONS, ORIGINATING IN CENTRAL OR WEST ASIA, ARE CULTIVATED THROUGHOUT NORTH AND SOUTH CHINA. THEY CONTAIN NUTRIENTS SUCH AS POTASSIUM, VITAMIN C, FOLIC ACID, ZINC, SELENIUM, AND FIBRES, WHICH ARE RESISTANT TO INFLAMMATION, HYSTERIA AND URINE. IN ADDITION, IT REMOVES OXYGEN FREE RADICALS IN THE BODY, INCREASES METABOLIC CAPACITY, RESISTS AGEING AND PREVENTS OSTEOPOROSIS, WHICH IS A HEALTHY FOOD SUITABLE FOR THE MIDDLE-AGED。