Lipoma=BENIGN. Lipomas are benign 'fatty tumors' that are very common. They need no treatment unless enlarging rapidily or painful. Once they form, they are there. I do not know of any 'natural cures'--sorry.
No. There are no diets or supplements that are known to have an effect on lipomas.
Lipomas seem to just. Occur in some people. There is nothing you can do to prevent them from occurring. The only way to get rid of them is surgical excision,