Most soaps use tallow (beef fat) as it's the cheapest and most plentiful fat, due to the beef industry making a lot of it. But vegetable oil-based is the more "

Most soaps use tallow (beef fat) as it's the cheapest and most plentiful fat, due to the beef industry making a lot of it. But vegetable oil-based is the more "attractive" soap; it's generally modified to be softer on the skin and causes less harsh reactions than tallow, and of course there's vegan soap.