Spray-on hair generally works in one of two ways.
Either it directly colors the scalp and enhances whatever hair is in the area by thickening it, or it generates hair-like filaments that cling to the scalp and existing hair.
[2] The product "was popular in the 1990s with 30-minute infomercials for the product on late-night cable TV",[3] and the Ronco version sold over a half million cans.
[3] GLH came out in liquid form but contained powder particles that stuck to the follicles on the scalp.
[4] In the documentary TV series Bald!, spray-on hair is one of the products tried by a participant on the show, which generated poor results.