> create stem cells (induced pluripotent stem cells, or iPSCs) from non-stem human cells for a while,

Have some liposuction, chemically and mechanically alter some of the fat cells into iPSC's in the test tube, that's more like a factory process, that conjures up images of 90's garage based Ecstasy labs, before reinjecting back into the body.

Its not something the body can do itself, and its one of the things used in cancer treatments to boost the number of immune cells to compliment the chemical cocktail that you'll never find in Wetherspoons.

It should be noted that melatonin increases the release of stem cells from bone marrow, so getting plenty of sleep seems to be important, throughout life.