Maltodextrine will give a cider body, but head is mainly protein foam. You could just buy some MD and try adding various amounts to pints. It will degas a sparkling cider, though.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk