“New hydrating ultra moisture honey, olive, coconut, argan Madness Shampoo and Conditioner”
Gosh I would love to try a product made out of those 4 ingredients exclusively, if you know about it please let me know.
Shampoos and conditioners have all sorts of chemical components (yes, all natural brands are also created using chemistry) that make or break a product, but what really matters is the base ingredients, how they mix together, the molecule size, how big or small an ingredient is can determine how it will be absorbed in the scalp and hair shaft and off course the pH, a pH balanced shampoo is so much better for the hair than a natural alkaline “cleansing agent”.

Source: Google Scholar
Special ingredients are what each cosmetic product has as a unique individual characteristic, and also a powerful marketing tool. They can improve the quality of the product to another level; but they can also increase the price either because they are rare ingredients, they are costly to produce or because it is a hype and it sells well.
How to invest wisely? How to know the difference, quality vs hype? The simple answer is with science.
The base of every product is more or less the same, so once you have found a mix of base ingredients that work for you usually ( for simplicity lets say the first 5 ingredients) you can look for add on special ingredients.
Lets try it with shampoo, because we have this great info-graphic available. If we have a good base of detergent, conditioners, sequestering agents and thickeners we are highly likely to get good results regardless of it having or not the most precious golden oil from a beautiful country, off course if its a good product and has the special additive it will be an even better product.
A good add on special ingredient, with a good base will certainly increase the quality of the product, and is worth the price tag; but a good add on with a bad base means money wasted in developing the product and by the final consumer.
A good base for curly hair in terms of shampoo has only 1 detergent if you see 2 types of deep cleaning agents in a “moisturising shampoo” do not buy it, it will dry the hair out and eventually will make you believe that all shampoo is bad for curly hair when the problem was a bad mix. Always use pH balanced shampoos, any shampoo with a pH above 5,5 will highly likely irritate and dry out the scalp. I am aware we can not check the pH of products on the hair care aisle but some state it in the label and we have no choice but to believe.
Special ingredients should be high on the list if the product claims to be made exclusively or mainly out of that ingredient, but if the product only states that it contains the ingredient and you like the first ingredients lets say 5-10 and then see a special additive you would like to try that is also fine.
The idea is to shop wisely and to not fall for misconceptions or marketing tactics either in favour or against certain products.

My favourite Special ingredient: Argan oil Source: pinterest