The main problem I see with shampoo bars is most people have no clue how to formulate them properly. Looking at some of the ingredients lists they put insane amounts of oil, butters and even saw one with wax. Lush and other bars I’ve seen don’t even melt the SCI pellets so it looks like it would harshly tear through the hair. Some brands are just regular cold process soap masquerading as ‘shampoo bar’.