1, because of the "therapeutic" effect of that leaf on cancer. It can be said that the effect is the same as that of white rice, vegetables, rice, whole grains and fruits we eat every day.

2. If you really want to say that the leaf has a therapeutic effect, then the daily food has the same therapeutic effect.

3. After reading the landlord's own answer (netizen), I would like to add that "it can treat cancer" is such an earth-shattering technology! South Korea invented and produced. Our country doesn't apply for world patents first? Developers are even more pig-headed, and they don't make big money, so they go to coolie production to make small money? Can you make up such advertising lines? Landlord, you are a pig!