Well, if you are into metaphysics, you may know that maybe one out of 10,000,000 people don't need to eat enough to use it.
If you are fasting and are able to live on very little or nothing, you don't need anything at all.
That is the only route to advancement that impresses me so far.
“You may control a mad elephant; You may shut the mouth of the bear and the tiger; Ride the lion and play with the cobra; By alchemy you may learn your livelihood; You may wander through the universe incognito; Make vassals of the gods; be ever youthful; You may walk in water and live in fire; But control of the mind is better and more difficult.” ― Paramahansa Yogananda, Autobiography of a Yogi