i did not look at above posting of web site yet...you can take unscented bar of soap..grate add water..melt..like remilling...after it cools add one raw egg..mix in well...use as shampoo..keep in refrig...no preservatives so shelf life is only a few days..so mix only amount youd use in few washings of hair...can scent if youd like.....if you were to add egg into batch of homemade soap id start with just a small one pound batch or less. the egg more then likey will cook from heat or lye water..leaving id think chunks of cooked eggs in final bar... i will check out site & see how they do it.