Sell placebos as a weight-loss drug, but charge so much for them you won’t be able to buy food. BRILLIANT!
True story: while working in the ER I'd often see little old ladies come in who worried too much about their health. They'd come in with things like headaches. After a full workup if the doctors didn't find anything they'd sometimes order what they call the "NaCl cure"...meaning a saline injection. Often when the patient got the saline injection they'd quickly report their pain was completely gone.
The placebo effect.