Efficacy 1: strengthening yang and nourishing yin; Efficacy 2: detoxification and seasoning; Efficacy 3: cancer prevention; Efficacy 4: sweating and bacteriostasis; Efficacy 5: dilate blood vessels.
Although green onions have many of the above effects, they must be eaten alone or often with other foods to play a role; If you just smell it with your nose, it won't do, let alone improve your health!