I'm a little confused. These shampoo bars, are they any different from a regular bar of soap? I bought this all natural soap bar and I'm thinking of trying it out. Here are the ingredients:

Olive oil, palm kernel oil, distilled water, coconut oil, safflower oil, sodium hydroxide, sweet almond oil, castor oil; essential oils of lemon and lavender; red sandalwood powder; annatto seed powder.

Can I use it on my hair? How do I use it? How much do I apply? How often do you find you need to cleanse? Sorry, I'm a bit of a newbie!