Shampoo & Conditioner
Bicarbonate of soda
That. Is. It.
You need one part bicarbonate of soda to three parts water. So you can make it in however big a batch you like. Mix it up straight into a washed out old shampoo bottle or in a jug. Make sure you give it a good shake before each use.
It can be a bit odd to start with as there is no foaming like with normal shampoos (which is good because foaming agents are usually harsh chemicals) and as it's not thick and gloopy it means a little bit of concentration is needed to get it where it needs to go. If you want to thicken it up though then try adding cornstarch or blend up some whole oats and mix them in.
It can also take your hair a little bit of getting used to. Normal shampoos strip your scalp of all its natural oils which means your body makes more to keep everything flake-free. So when you stop using them your scalp will continue to make more than is needed to moisturise your head and so your hair might get a little greasy. But don't worry, within a week or two your body will readjust itself.
When you rinse it out your hair might feel greasy sticky. It's anything but, trust me. But without all the questionable ingredients in normal shampoo that coat your hair, it can feel a bit...grim. So follow up your shampoo with this homemade conditioning vinegar rinse. Another simple recipe - just one part white or apple cider vinegar with four parts water. Pour over your hair (avoiding your eyes at all costs!) and then rinse. The smell will soon vanish but you can add a few drops of organic natural oils if you like. You'll be left with smooth shiny, frizz-free hair. Naturally.