The most common and widely used hair cosmetics are shampoos. A shampoo; It is used to remove sebum, eccrine and apocrine sweat glands secretions, fungal elements, skin residues (corneal desquamation), shapers such as jelly, briantin and environmental dirt. Its main purpose is to beautify the hair and to provide hygiene. If there is a high level of detergent in the shampoo, the hair strand peels off the outer cuticle layer, making the hair more curly, dull and difficult to open. Some shampoos can cause contact dermatitis.

General allergen substances found in them are as follows;
* Cocamidopropyl betaine
* Methylchloroisothiazolinone
* Formaldehyde-releasing preservatives
* Propylene glycol
* Vitamin E (tocopherol)
* Parabens
* Benzophenone.

One of the most important components of shampoos are surfactants (surfactants). These reduce the surface tension between water and dirt, allowing dirt to be easily removed from the hair and skin.

Surfactants are divided into 4 groups:
* Anyonik
* Katyonik
* Amfoterik
* Nonionik.

The soap we know is an anionic detergent. When the hair is washed with soap, calcium salts, which are an alkaline residue, settle on the skin and hair follicles and cause dullness and breakage; It causes irritation to skin and mucous membranes (inside the mouth, inner eyelid, etc.). New anionic surfactants (alkyl sulfates, alkyl ether sulfates) do not create such an effect. Anionic surfactants such as Ammonium Lauryl Sulphate (ALS), sodium laureth sulphate (SLS), sodium laurel sarcosinate, sodium myreth sulphate, sodium pareth sulphate, sodium lauryl ether sulfate (SLES) cause curling and abrasion due to friction in the hair. Cationic surfactants (such as chlorides and bromides of benzalkonium and alkylpyridinium ions) are softening agents.

Choosing SLES, SLS, paraben and non-silicone products while purchasing shampoo guarantees that we will do a healthy cleaning.