Placebo effects?

Not deceiving anyone but sometimes it is nice to one’s mind that certain substances works for you rather than susing other substances or products which may be harmful to one health in the medium to long term.

There is conclusive evidence that placebo is real though the key is far from being discovered.however placebo effect belong to the realm of neuro pychiatry and it is thought to be applied in very difficult cases like severe chronic conditions.

So guys do you think placebo can be applied to PE and mind conditioning even by consuming harmless stuff like a handful of seeds can one trick the mind and reverse a condition?