So until about 6 months ago i just thought that shampoo was shampoo. I had no idea of the mechanics behind the lathery liquid. So here's a summary of the different shampoos you can purchase :)
Neutralising shampoos are typically shampoos that are used immediately after putting chemicals in your hair such as a relaxer, or after dying your hair. This type of shampoo neutralises the chemicals bringing your hair back to the correct Ph level.
If you self- relax, this shampoo typically comes in the relaxer pack, but an example of a neutralising shampoo would be Organic Root Stimulator's Olive Oil Neutralizing Shampoo
This type of shampoo is used more frequently, especially to eliminate dryness. Moisturizing shampoos are needed to keep the hair moisturised, and help to decrease breakage.
Example: Elasta QP Creme Conditioning Shampoo, Creme of Nature Ultra Moisturising shampoo, Shea Moisture Moisture Retention shampoo
Clarifying shampoos are used to strip the hair of product buildup. This type of shampoo can be harsh and will cause more dryness if used regularly and so it's best to use a clarifying shampoo once a month , rather than weekly, to remove the clogs of product buildup, leaving a clean scalp.
Example: ORS Creamy Aloe Shampoo, ORS Uplifting Shampoo
Sulphate- Free Shampoo
Typically shampoos contain sulphates which are very good at cleaning your hair, but can also leave your hair very dry. Common sulphates that are used in most shampoos include Sodium Lauryl Sulfate, Sodium Laureth Sulfate and Ammonium Laureth Sulfate. You can identify the sulphates in your shampoo by checking the ingredients list on the label; it is usually listed after water. There are shampoos available which are sulphate- free which are great for those who suffer with dry hair. Natural shampoos are your best bet, however, commercial products which are sulphate- free include Elasta QP Creme Conditioning Shampoo, Body Shop's Honey shampoo and Shea Moisture shampoo
There are many more examples but i thought i'd just list a few which are more commonly known and easily accessible in the UK.
Just a little disclaimer... I'm not an expert, i am merely sharing information i have learnt
I hope this information has helped anyway :)