Does rinsing hair with beer make it stronger and fuller?
I don’t believe it makes it any fuller, but it is nourishing and will make it shiny, I have heard that beer was used as conditioner by the Ancient Egyptians. Some shampoos have beer as an ingredient, which is probably the simplest way to use it (Linco Beer is about the best). If you do rinse with actual beer use an organic real ale (preferably a home brew) to get the maximum nutrients and minimal chemicals (commercial beers are full of horrendous unpronouncable things you wouldn’t want to even drink most of the time), and rinse with cold water afterwards. Don’t whatever you do rinse with lager dregs from your local- you’ll only succed in making yourself smell like an alcoholic! Since first writing this answer I also came across the suggestion that beer could be used as a styling product used on damp hair instead of mousse, giving increased body.