Extra volume, extra shine, anti-dryness, anti-split ends, curly hair, straight hair, frizzy hair, flat hair. The choices are endless when trying to select the right shampoo. And in the ned, all of them are filled with unescesary chemicals.
Take any shampoo from the drugstore and read the lable. You will most likely find isopropyl, a solvent that dehydrates and irritates your skin, is known to increase aging and can damage your immune system; propylene- and butylene glycol which can penetrate your skin and weaken your protein structure, among other things. And those are just two of the forty-something ingredients found in shampoo.

So what does one do to maintain a beautiful head of hair without damaging the scalp or the enviroment?

There are plenty of alternatives.

The first one is to stop using shampoo and simply use apple cider vinegar and baking soda. I use this method and my hair is reborn! My hair has a fine texture, but I have insane amounts of it, so it was always flimsy and very difficult to set. After I switched from a hair-salon shampoo to vinegar and baking soda my hair has become silky, smooth and soft and is incredibly easy to set, even in very elaborate hairdos with minimal use of styling products.

To wash your hair this way, mix 1 tablespoon of baking soda with 2 tablespoons of water and apply it to your roots. Massage well to increase bloodflow to your scalp. Let it rest for a few minutes and rinse it out.
Next, mix about 2 tablespoons of apple cider vinegar wit 0.5-1 cup of water depending on the length of your hair. Pour it over the ends of your hair, let it rest for a minute and rinse.

Done! That's all there is to it.
If you are not quite ready to take the leap and stop washing your hair, a good option is to change shampoo, and perhaps decrease the frequency of using it. Ask any hair expert and they will tell you that you should avoid washing your hair more than once or twice a week.
Go to your local health store and ask the clerks. You will want a shampoo with as little content as possible, something that would suit hyper-allergy. It doesn't have to be expensive, but remember that decreasing your hairwashing and using less shampoo will make a bottle last longer.